Two people were killed and a 20-year-old son of a deputy is in custody after an on-campus shooting at Florida State University's campus in Tallahassee.

After a deadly shooting at Florida State University, questions emerge about how the stepson of a beloved deputy tasked with school safety became the suspected gunman.

Police believe the gunman acted alone and a motive was not known. The suspect had access to his mother's handgun, which was once her service weapon.