in a pet crate on the driveway. the cub was left with a note reading, "please help moses. he doesn't have a mother." moses was in good health but very tired, very hungry. so crews with the bear league fed him some baby bear formula. wildlife officials were not able to find the cub's mom. so moses was taken to a rehab center that takes care of baby animals that are unable to survive on their own. the person who found moses may have good intentions, but officials say just leave them alone since their mom may actually be nearby. we hope moses is okay. cbs evening ne >> what do we want? >> justice! >> when do we want it? >> now! >> maurice: new arrests at pro-palestinian demonstrations on college campuses at the height of graduation season. as president biden prepares to make a commencement speech at a georgia college, the school says it will halt sunday's ceremony on the spot if protesters interrupt.

>> his decisions do not reflect the moral compass of ourselves, the students. >> maurice: the "cbs evening news" starts now. ♪ ♪ good evening, and thank you for being with us. i'm maurice dubois. norah is on assignment. tonight, we are following escalating pro-palestinian protests on campuses around the country. in california, police in helmets and riot gear cleared a lecture hall at uc irvine, arresting 50 people. chicago police arrested two protesters at depaul university while clearing that encampment. at least five students chained themselves to columns at the university of oregon, and at the university of michigan, protesters placed fake bloody body bags outside the private home of a school board member. these scenes are playing out in the middle of graduation season, and this weekend, president biden could step into the fray when he travels to georgia to give the commencement address at morehouse college. cbs's nikole killion reports on

how the school and the white house are preparing for possible disruptions. >> reporter: tonight, at morehouse college in atlanta, fences started going up around the campus ahead of president biden's commencement address this weekend, as concerns build for possible protests. the school's president, david thomas, warned he will halt graduation ceremonies if demonstrations erupt. >> if my choice is 20 people being arrested on national tv on the morehouse campus, taken away in zip ties during our commencement, before we would reach that point, i would conclude the ceremony. >> free, free palestine! >> reporter: for weeks, some students and faculty have challenged leaders at the historically black college to rescind biden's invitation over his administration's response to the war between israel and hamas. >> we feel that all of his decisions do not reflect the moral compass of ourselves, the students, of this institution,

and largely, of the black american population. >> reporter: last week, the white house dispatched senior advisor stephen benjamin to meet with students on campus. >> i think as long as there are peaceful protests that don't disrupt the amazing moment that is for each of those graduates there today, i think we'll all consider it a success. >> reporter: the president's visit comes at a critical time in a critical battleground state. biden flipped georgia in 2020, but if the election were held today, a recent "new york times" siena poll shows him losing to former president trump by ten points, as both candidates try to shore up support with black voters. >> look, trump hurt black people every chance he got. >> reporter: engineering graduate fabin nwaduba wants to keep politics out of it. >> i mean, this is like one of the happiest days of my life. you know, they come over and ruin it, i don't know, i'm gonna be hurt. >> reporter: today, morehouse faculty voted in favor of conferring an honorary degree on president biden.

the white house says the president isn't concerned that his visit could overshadow sunday's graduation and that he plans to engage with students and faculty while he's here. maurice? >> maurice: nikole killion in atlanta tonight, thank you. michael cohen faced hours of intense questioning today at former president trump's criminal trial. defense attorneys accusing him of lying and attacking his character and his testimony. cbs's robert costa once again tonight from the courthouse in lower manhattan. >> reporter: former president donald trump appeared to be closely watching as his defense tore into the credibility of michael cohen, who has acknowledged lying under oath in past cases. >> the last time i appeared before congress, i came to protect mr. trump. today, i am here to tell the truth. >> reporter: as the prosecution's star witness, cohen says he lied because of his loyalty to trump and has testified he paid adult film star stormy daniels $130,000 to suppress her account of an

alleged sexual encounter with trump to stave off a scandal ahead of the 2016 election. and cohen has testified he called then-candidate trump to update him about the transaction. but on thursday, defense attorney todd blanche accused cohen of lying about the call and instead claimed cohen was reaching out to trump's bodyguard to get help because he was receiving harassing phone calls from a 14-year-old prankster. "part of it was the 14-year-old," cohen testified, saying he discussed the prank calls while also updating trump about the deal. >> the prosecution misses that michael cohen was talking and complaining about some teenager who was pranking him. that's an unforgivable miss. >> reporter: in an effort to raise doubts about cohen, blanche played comments from his podcast railing against trump. >> you better believe i want this man to go down and rot inside for what he did to me and my family. >> reporter: cohen was sentenced to three years in prison amid the fallout of a

federal investigation related to his payments to daniels. although he admitted to violating campaign finance laws, he believes he was wrongly charged with tax evasion. >> i have never asked for, nor would i accept, a pardon from president trump. >> reporter: in another tense exchange, that past testimony was brought up today, and cohen said he and his attorneys did explore a pardon from trump. in court, trump was again joined by several republicans from capitol hill, who spoke out against michael cohen's testimony, while trump remains under a gag order. >> and they are all up in arms over this, they can't even believe it. >> reporter: cohen will be back on the witness stand on monday, and trump's team could finish up its cross-examination that day. a source close to trump tells me he might want to take the witness stand, but for now, that's unlikely. maurice? >> maurice: robert costa in new york city tonight, thank you. back here in washington, house republicans are pushing to hold attorney general merrick garland

in contempt of congress. that's because of garland's refusal to hand over audio recordings of president biden's interview with special counsel robert hur, who declined to recommend charges in biden's classified documents case. the justice department released transcripts from that interview, but today, the president asserted executive privilege over the recordings. turning to the israel-hamas war, desperately-needed humanitarian aid could soon be on its way to the people of gaza, as the u.s. military has finished building a floating pier just off shore. and tonight, we are hearing heartbreaking accounts from american medics, bearing witness to the horrors of the war and its most innocent victims. here is cbs's imtiaz tyab. >> reporter: with the massive u.s. military-constructed pier now in position, hundreds of tons of desperately-needed aid will start arriving in gaza in a matter of days. and the aid can't come soon enough for the almost 2 million displaced and for those facing famine.

but for 10-year-old somaya, who lost her arm in an israeli air strike, what she needs is advanced medical care. "i want the border crossings open," she says, "so i can get a new arm and be like everyone else." also trapped inside gaza are around 20 american medics, doing all they can while they wait to be allowed to go home after the two main crossings in the south were closed. we reached dr. mahmoud sabha from texas and nurse monica johnson from oregon. >> so, you know, we came in with such good intentions, obviously, and wanting to help and save lives. we haven't had a single wound patient in the icu that has made it out. >> reporter: not a single one? >> no. >> reporter: most of their patients are kids. >> she had glitter on her fingernails. she had this colored hair. these things like -- these things -- it -- it really affects you because, in this,

you really see the innocence. >> they're broken, and they are empty. so the thought of leaving them and... you know, leaving them while they're so empty is heartbreaking. >> reporter: and tonight, the israeli military has confirmed it sent more troops into the southern city of rafah as israel's government is expected to approve widening the offensive there. maurice? >> maurice: imtiaz tyab in tel aviv tonight, thank you. tonight, parts of texas and louisiana are facing possibly life-threatening flash flooding from another round of extreme rain. let's bring in meteorologist mike bettes, from our partners at the weather channel. good evening, mike. >> good evening. heavy thunderstorms and heavy rain becoming a major concern, now and through the weekend, along the gulf coast. you notice this area with a high risk highlighted in red. that means a significant threat for some flooding. even areas from alexandria back toward dallas could experience some flooding.

but what does that mean, a high risk? well, how about this stat? high-risk days, they happen less than a handful of days a year but account for over 39% of all flood-related deaths in the united states. moderate-risk days account for 17%. heavy rain, texas and louisiana through the night tonight. heavy rain all across the southeast. through the day tomorrow, as well, some storms return again for us tomorrow evening and even into our weekend. in total, a lot of places here will pick up 2 to 3 inches of rain, with pockets of 3 to 5 or even isolated areas of 5 inches or more which, of course, leads to a very dangerous flood risk. >> maurice: okay, mike bettes, thank you. now to our investigation into how thousands of guns, once carried by police officers, are turning up at crime scenes around the country. cbs news partnered with nonprofit newsrooms "the trace" and "reveal" to survey nearly 200 police departments nationwide, and most told us they trade or sell their used guns. here is cbs news investigative correspondent stephen stock.

>> a person shot. >> reporter: indianapolis... >> black male shot. >> reporter: has a gun problem. >> ems is en route. >> reporter: firearm deaths of young people last year jumped 70%. >> another family lost another child at the hands of a firearm that shouldn't even be on the streets. it shouldn't even be on the streets. >> reporter: candace leslie's only child was shot to death. cbs news discovered one of the guns involved in cameron brown's death was once owned by a sheriff's department 2300 miles away in stanislaus county, california. >> there is no reason for police firearms to be in the hands of teenagers. >> i would say to cameron's mom, i'm very sorry for your loss, but my organization had nothing to do with it. >> reporter: sheriff jeff dirkse's agency is one of more than 140 nationwide that we learned sell or trade in their used weapons when they update their arsenals. >> it's a legal transaction. i'll go back, so if i

legally sold my old used patrol cars and somebody uses that in the commission of a crime, is that our responsibility? i would say no. >> reporter: dirkse says he saved taxpayers $25,000 last time he traded in about 650 guns. during a 16-year time period ending in february 2022, the atf traced 52,529 former police service weapons to crime somewhere in america. on average, that's more than 3200 guns every year. 9 every day. and our analysis of atf documents shows guns in crime traced to law enforcement agencies nationwide. in indianapolis, like so many american cities with a gun problem, the police department trades in its weapons. >> as a police chief, i don't want anything, any weapon that we owned to end up being used violently against another person in our country. >> reporter: you'd be open to stopping that practice? >> well, i'd have to see,

you know, the taxpayers pay for these things. >> reporter: cameron's mother says there is a greater cost. >> this one gun has hit home for me. it's changed my life forever. >> reporter: changed by a gun originally meant to protect and serve. maurice, the atf is required under federal law to melt down its guns. the white house office for gun violence prevention would not agree to talk to us. >> maurice: eye-opening reporting. stephen stock, thanks so much. tonight, a preview of norah o'donnell's one-of-a-kind interview with pope francis on this sunday's "60 minutes." the head of the catholic church shares his views on a range of issues, including a big shift under his leadership. >> norah: last year, you decided to allow catholic priests to bless same-sex couples. that's a big change. why? >> interpreter: no, what i allowed was not to bless the union. that cannot be done because that

is not the sacrament. i cannot. the lord made it that way. but to bless each person, yes. the blessing is for everyone. for everyone. to bless a homosexual type union, however, goes against the given rite, against the law of the church. but to bless each person? why not? the blessing is for all. some people were scandalized by this, but why? everyone, everyone. >> norah: you have said "who am i to judge? homosexuality is not a crime." >> interpreter: no, it's a human fact. >> maurice: and you can watch norah's interview with pope francis on this sunday's "60 minutes," followed by a prime-time special on monday right here on cbs. don't miss it. a man convicted of killing a black lives matter protester is

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call now! >> maurice: president biden me >> maurice: president biden met today with two of the original plaintiffs in the case, decided 70 years ago tomorrow. it outlawed segregation in schools, an important step in the fight for racial equality. tonight, janet shamlian introduces us to the woman now running the topeka schools, guided by the legacy of that supreme court decision. >> i heard you had a birthday. >> reporter: home-delivered birthday gifts and cake aren't generally considered part of a school curriculum. >> good morning! >> reporter: but topeka schools superintendent tiffany anderson rarely sticks to a lesson plan when there's a child in need. >> if we don't do it, who will? >> reporter: the district at the center of the 1954 brown versus board of education ruling outlawing racial segregation in schools...

>> in the past, they have tried doing "separate but equal." >> reporter: is now helmed by its first black female superintendent. 70 years later, do you live with the burden of their hope and dreams? >> i think 70 years later, i live with the privilege to help their hopes and dreams come to life. i'm standing on their shoulders. >> reporter: high school graduation rates have skyrocketed, from near 70% to 91% during her eight-year tenure. she's established morale-boosting programs, like graduation ceremonies for students in the nearby state correctional facility. >> so have faith that you will make it through and be out of this space. >> reporter: in a district where almost half of students qualify for subsidized lunch, she put washers and dryers in schools. >> 3t. >> reporter: as well as food and clothing pantries. >> it's not really hard to get people on board when they know that you care and they know they can be part of something pretty incredible and transformational. >> reporter: why isn't it happening somewhere else?

>> sometimes fear. fear can make you choose not to accept other people. fear can shut down systems in a way like nothing else can. >> reporter: the historic district is transforming once again, this time opening its doors to refugees and migrants. >> just because somebody doesn't speak english doesn't mean they are less valuable to a community. >> reporter: students from more than 40 countries have enrolled. >> we have clothing. >> reporter: director of cultural innovation, pilar mejia welcomes each one. without this program, where do you think some of these families would be right now? >> it would be tragic. they might end up in -- either not being able to come, or stay in situations in their countries that are dire. >> reporter: is there any connection you can draw they are between what is happening now with these kids and the situation at the time? >> the connection is they all are looking for a better and brighter future. they are all hoping for something better for their lives. we are dealing with families who want more for their children.

>> reporter: it's that better, brighter future that was fought over 70 years ago in the schools of topeka. janet shamlian, cbs news, topeka, kansas. >> maurice: "heart of america" is next. but first, norah o'donnell's words of advice for the graduates today at georgetown university. >> norah: now it is time for you to use the values and the knowledge that you have learned here to lead a life of purpose, of kindness, of gratitude, of impact, and integrity. and most of all, of love and understanding of one another. ♪ ♪ >> announcer: this portion of the "cbs evening news" is sponsored by fresh pet. it's not dog food. it's food food.

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standing at 8300, up 7% from 2022. the good news, it appears more people are in shelters. burks the number of people living on the streets or their ca