A man was found shot to death in a van on I-57 on the Far South Side, in addition three people killed and 11 others injured in gun violence in Chicago from Monday afternoon through early Tuesday.

The man was identified as Maurice Johnston, 37-year-old, and was found around 8:35 p.m. after he crashed the van in the northbound lanes of the expressway near 108th. An autopsy Tuesday determined he died from a gunshot wound to the head. 

Witnesses told investigators they saw the man driving a silver van on South Hamlet Avenue near 110th Street, then heard gunshots, police said.  The man drove onto the 111th Street ramp to the northbound lanes of I-57 and crashed, police said.

He had a gunshot wound to the head and was pronounced dead on the scene.

Less than three hours later, a man was killed and two others were wounded in a Noble Square shooting around 11:10 p.m., police said.  They were in the 1500 block of West Walton Street when someone walked up and fired shots, police said.

In addition a 26-year-old man was shot in the chest and pronounced dead on the scene, a 19-year-old man was shot in the head, and also 20-year-old man was shot in the arm. They went to Stroger Hospital and were listed in serious condition.