as deputies closed in, investigators believe the final shots were 57-year-old samuel cassidy taking his own life after killing nine coworkers. we immediately go in. this protocol, i believe, saved lives. there were over 100 people in that area. he had a lot of additional ammunition. reporter: but no one has been able to answer the most pressins question: why did this happen? jamie yuccas, cbs news. o donnell: and tonight, the manhunt for three gunmen who opened fire on a concert crowd near miami may be expanding to more possible suspects. we get the latest now on the investigation from cbs manuel bojorquez. reporter: tonight, a closer look at surveillance video reveals the possibility of an additional shooter or shooters in the attack that killed two people and injured 21 after a rap concert sunday. miami-dade police previously released this video of the s.u.v. used in the shooting, and
say now is not the time to put them in jeopardy, as they are just trying to do their job. they re doing their job. they are following regulations, and they re there to keep you safe. it is absolutely unacceptable. to ever mistreat a transportation worker, and, of course, there s very serious fines and enforcement around that. it s a matter of safety, but it s also a matter of respect. and a majority of passengers have been peaceful on this big weekend for air travel, the tsa screened 1.9 million people at airports across the country on friday, that is a new record of the pandemic, the big question on this big day where everybody is going home is will we see the elusive 2 million mark, a number we ve not seen since march of 2020. ana? pete muntean, thank you for that latest information. they re still out there, florida police are searching for three suspects who fired on a concert crowd, killing at least
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