BOISE -- The name of a man found dead after a "low-speed" collision with a mailbox in Boise's North End has been released.

The Ada County Coroner's Office identified the victim as 48-year-old Frank William Sutton of Boise.

Officers were called out to the area of North 7th and Ridenbaugh streets at about 8:30 a.m. Saturday. They arrived to find Sutton's car crashed into a mailbox.

The car was locked and still running, police say. Officers were unable to rouse the driver; after breaking one of the car's windows, they realized he was dead.

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The driver's cause of death remains under investigation, although investigators say they do not suspect foul play.

Coroner Dotti Owens said officials are waiting on the results of toxicology tests to determine how Sutton died.