Sheriff Lynn Boyte said Thursday the Unlawful Flight to Avoid Prosecution bulletin would draw more agencies into the search for Jeff Allen. Allen was indicted in March on charges of unlawful manufacture of marijuana and had been free on a $50,000 bond since his arrest.
"This doesn't mean he's not crashed somewhere, it just gives us some alternative help in checking places," Boyte said.
Boyte said the bulletin will allow federal authorities to assist in the search.
"Hopefully, one of us will turn up something," Boyte said. "We need to put all the effort we can into locating him."
Allen, 46, disappeared around 2 a.m. Nov. 16 while he and McComb pilot Dr. Larry Stewart were returning in separate planes from Ocean Springs after a performance at a Biloxi casino. Stewart touched down in McComb but was unable to contact Allen after landing.
The Civil Air Patrol has been trying to locate him.
Searches, including one near Covington, La., where radar indicated Allen may have been headed, have turned up nothing, said Johnny Taylor, search coordinator for the CAP.
Taylor said a flyover of the McComb area was scheduled for Friday.
Following that, if there are no new clues, Taylor said the air patrol's search could be closed or suspended.
"We have searched everywhere we've had evidence, radar sightings and clues," Taylor said. "Once you've resolved all of those, there's not much more you can do."
Taylor said officials with The Air Force Rescue Coordination Center in Langley, Va., and the Mississippi Emergency Management Agency would decide whether to suspend the search.