The FBI is looking into Omar Mateen's purchase of plane tickets for himself, his wife and child days before he unleashed the massacre in Orlando's Pulse Nightclub, a law enforcement source close to the investigation told Fox News on Wednesday.
The tickets were for a flight to San Francisco set for weeks after the June 12 attack. Fox News is told the FBI is trying to make sense of the timing.
Mateen's mother-in-law lives in the Bay Area. She had underwent an operation and was not recovering, NBC News reported.