get in the truck, ill take you to the hospital.... thinks about how his life is now destroyed on the way and then (whack)... hides the body, goes back to get the bike and check for any evidence... dumps bike off bridge on the way out of dodge...
plausible...
which begs the question ...would LE have reviewed LUS (or others on st landry) cam recordings an hour or more farther along, say 4 am or so