William Mazo killed, David Lanning seriously injured when their car leaves road, crashes into tree.

Southington Police have identified the man killed in a one car crash Thursday afternoon.

Police say that William Mazo, 19, of Middlefield, was driving a Chevy Avalanche on Meriden Ave. just before 3 p.m. when the SUV crossed over the double yellow line.

The SUV left the roadway and traveled for several hundred feet before colliding with a tree.

Mazo was pronounced dead at the scene. David Lanning, 20, also of Middlefield, was a passenger in the car. Lanning was trasported to Hartford Hospital by Lifestar.