Investigators still searching for motive in Dayton shooting
02:31Authorities are trying to figure out what motivated the 24-year-old gunman to put on a bulletproof vest and kill nine people in just 30 seconds -- including his 22-year-old sister.
Authorities are trying to figure out what motivated the 24-year-old gunman to put on a bulletproof vest and kill nine people in just 30 seconds -- including his 22-year-old sister.