“We find out that Donnie borrowed the shotgun from a friend…” — Perhaps It's You at 39:07

Perhaps It's You S6 Ep8: 2000 Enemies

“We find out that Donnie borrowed the shotgun from a friend only three days earlier. He also admitted to keeping it in his car. They are able to track down the purchase of the ammo, which was the same day as the fire. Very suspicious. He also purchased two containers of gasoline that day at the local gas station. You…”