Authorities are looking into the death of a Southern Wisconsin driver.

Janesville Police aren't talking about the traffic stop, but a Madison TV station found that 29-year-old Jason Stacey was stopped for speeding and tested over the legal limit for blood-alcohol content early yesterday around one in the morning.

The Janesville officer didn't arrest the man but prevented him from driving until a friend picked him up.

Three hours later, Stacey was driving again and was killed when his car left the road, slammed into a tree and burst into flames.