The incident was investigated by the FBI, Transportation Security Administration, Homeland Security Investigations and Tulsa International Airport authorities. TULSA, Okla. — A Vancouver man whose screaming and threatening a flight attendant aboard a Delta Air Lines flight prompted an emergency landing in Oklahoma will be released to his parents pending trial.Court documents show 29-year-old Bolutife Olorunda of Vancouver pleaded not guilty Wednesday in U.S. District Court in Tulsa to interference with flight crew members and attendants.The Tulsa World reports a federal magistrate said Olorunda will remain in custody until his parents take him to their home in Indiana. He must surrender his passport and stay away from airports.Jail records show Olorunda is still in custody Thursday.An affidavit alleges Olorunda was loudly singing and screaming during a May 30 flight from Portland to Atlanta. During the flight, Olorunda acted erratically and was disruptive, and ignored directions from a flight attendant. The captain decided to divert the flight to Tulsa, Okla., International Airport, a news release said. Two federal air marshals who were on the flight handled the situation until the aircraft landed. Tulsa International Airport Police then removed Olorunda from the aircraft and detained him.