Clark announced to approximately 20 local, state, and federal responding agencies on the scene that he was in charge. And they believed him. This included staff attached to organizations like the FBI, National Transportation Safety Board, and Army Corps of Engineers. For almost three days, Clark supervised rescue and recovery efforts, which for him meant things like going through the victims' personal effects, commandeering the use of a pickup truck from the local dealership (he told the owner that the National Guard had sent all their vehicles out of the country), and securing seven or eight rooms at a nearby hotel that only he'd use.
Oh, and it turned out that an actual Army officer died in the accident, so "Captain" Clark secured the soldier's briefcase, inside which he found a phone number for the man's widow. Naturally, he took it upon himself to give her the terrible news. You know, as a fellow officer.
Via Sean Linnane
Yeah, we're guessing the sort of mental problems he has are incurable.
Eventually he was called out by the mayor of a nearby small town, and of course Clark turned himself in and apologized for the ruckus caused by assuming command of a situation he was not remotely qualified to handle.