Nope! If he used the pistol that's in the picture just above his head (pretty likely due to the proximity) there would only be a somewhat small exit wound. I've seen several headshot suicides during my career and the ONLY ones that blew out a large portion of the head was with a 12 ga. shotgun and with a Ruger Redhawk 44 mag and with the 44 mag the guy's brains were right next to his head, nowhere close to being splattered all over the place! The picture looks exactly like I would expect it to look after someone stuck a pistol in their mouth and pulled the trigger. Going on my experience there's no red flags in that picture!