oh snap!
Yeah saw the wreckage on the news...unreal. Can't believe the cops discussed what happend with you, they ususally say they're not allowed to discuss anything...especially a fatal acco.
White smoke = Water
Black smoke = Fuel
Blue smoke = Oil
Does the smoke dissapate into the air relatively quickly or does it linger around for ages?
Since your not really running for long (roughly 3 mins total) I recon it's most likely just condensation build up in your exhaust system.