(Above) A heavily damaged delivery van, parked on North Dearborn Street Wednesday morning, where a man in his early 30s landed after possibly jumping from the west tower of Marina City. Click on image to view larger version.

May 12, 2010 – Police are investigating the death Wednesday morning of a man who may have jumped from the west tower of Marina City.

According to Chicago police spokesperson John Mirabelli, the unidentified victim may have jumped from the roof of the west tower, a 60-story building. He landed on a white delivery van parked on the east side of North Dearborn Street, outside House of Blues.

It happened at about 9:48 a.m. A witness, Leo, who did not want his last name used, was standing near the southwest corner of the plaza level at Marina City.

“I heard a loud boom and I thought that a tire had blown out on someone’s car so I walked over to see what was going on and this man was laying on top of this van.”

He described the man as between 30 and 35 years old, about 5’9” tall, medium build, and short hair.

“The paramedics and the police were here very quickly,” he said. “They went right to work on him but he was gone.”

Officer Mirabelli says when police and fire department personnel arrived, they pronounced the victim dead at the scene. “Right now, it’s ruled as a death investigation, pending further investigation of our detectives.”

“At first look, it appears that he may have jumped,” said CPD spokesperson Robert Perez on Thursday, but “we’re still trying to determine whether he fell off, jumped, or was pushed.”

Witnesses believed the man jumped from closer to the 24th floor, which would be a residential floor, but according to Mirabelli, “It appears he may have jumped potentially from the rooftop.”

(Above) A view of the van from the 29th floor of the west tower at Marina City. Click on image to view larger version.

Another witness said the victim looked to be a “young guy.”

“I called in the accident this [morning]. I came around to the Dearborn side of the building after hearing a whoomph!”

The van was prepared for towing at about 12:52 p.m.

 Updated story: Marina Towers fall victim identified