with violent crime rising in los angeles, the head of the police union warns if you can, stay away. we can t guarantee your safety. it is really, really out of control. reporter: the chicago area has seen more than 1,000 homicides this year. three victims were university of chicago students. urban campuses are having to step up safety protocols, and the university is now using technology to get ahead of the violence. police is not the only solution. we are very focused moving forward and making sure we have proactive strategies, real-time data sharing, real-time intelligence sharing. reporter: philadelphia broke its murder record set in 1990 with 524 this year. several occurring near temple university. student sam collington killed recently by an apparent carjacker. that could have been me. that could have been someone i loved. reporter: when did you bury hahmir? saturday the fourth. reporter: instead of