passengers this morning after a pilot left his gun unattended in a men's room. when he returned minutes later it had been stolen. george, we're learning there's been an arrest in the case? >> reporter: it took an entire day of investigative work and 16 delayed flights. but just within the past ten minutes, philadelphia police confirmed the arrest of an airport janitor. after they found that gun in a custodian's closet a few steps away from where it was stolen. just beyond these tsa security lines in a public men's rest room, the theft of a pilot's gun prompted a security scare. airplane search and flight delays for more than 2,000 passengers like vincent peters. >> it finally came across the intercom and said there's been a bit of an incident in the airport. and no one is cleared for takeoff. >> the pilot had flown into philadelphia approximately 8:40 this morning from buffalo.