Complex sentence: White committed suicide by self-inflicted carbon monoxide poisoning on October 21,1985, when he ran a rubber hose from his car's exhaust pipe to the interior of the vehicle and let the vehicle fill with carbon monoxide.
Split into simpler sentences: White committed suicide by self-inflicted carbon monoxide poisoning on October 21,1985. He connected a rubber hose to his car's exhaust system and routed it to the interior of the vehicle, which he let fill with carbon monoxide.