Family members of Andres Yanez, 16, react to his death in his home on the 5500 block of South Sacramento Blvd. in Chicago, Friday, June 19, 2009. His father Francisco Yanez, 39, at center. Andres' aunt Maria Yanez, at left. His grandfather Manuel Yanez, 67, at right. (Alex Garcia/Chicago Tribune)

Family members of Andres Yanez, 16, react to his death in his home on the 5500 block of South Sacramento Blvd. in Chicago, Friday, June 19, 2009. His father Francisco Yanez, 39, at center. Andres' aunt Maria Yanez, at left. His grandfather Manuel Yanez, 67, at right. (Alex Garcia/Chicago Tribune)

(WGN-AM)- Andres Yanez tried to make friends wherever he went, so his sister can't understand why someone would ram the SUV he was in, flipping it and killing the 16-year-old.

"I'm still in shock," said his sister, Ariana Yanez, 22. "I can't believe that it happened.

"He was really friendly with people. Everywhere he went, he tried to make friends."

Police say they are investigating Andres' death as a homicide.

The crash occurred around 7:40 p.m. in the 6100 block of South Cicero Avenue, at the southeastern edge of Midway Airport, said Chicago News Affairs Officer Robert Perez.

Andres was riding in a black Oldsmobile Bravada SUV when it was rammed by a black Chevrolet van that had been chasing it north on Cicero, Perez said. The van hit the Bravada from behind, causing it to flip over several times until it ended up in the southbound lanes of Cicero, Perez said. Yanez was ejected and was run over by a car headed south on Cicero, Perez said.

The van, which had gold stripes or gold detailing on its sides, fled north on Cicero, Perez said. Police responding to the scenefound the Bravada on its roof.

Four other people -- apparently all passengers in the Bravada -- were injured, one seriously, Perez said. The seriously injured person was taken to Christ Hospital, and the other three were taken to Holy Cross Hospital in good condition, he said.

Yanez, of the 5500 block of South Sacramento Boulevard, had completed his freshman year at Gage Park High School , a spokeswoman for the Chicago Public Schools said today.

Ariana Yanez said if her brother was having any problems, he would have told her.

He recently found out he was going to be a father and began to pursue jobs, she said. "That's what he talked about, working."

She said some of her brother's friends were into gangs but he was not. "He used to talk about his friends being in gangs, how some wanted to change their lives," she said.

(The Chicago Tribune contributed to this story)

Get the latest news at the top and bottom of every hour on News/Talk 720, WGN