CHICAGO (CBS) — As investigators try to get to the bottom of a deadly weekend accident on the Bishop Ford Freeway, one major question remains.

As WBBM Newsradio’s Bernie Tafoya reports, that question is, what was a car doing stopped in the middle of the Bishop Ford Freeway around 130th Street with its lights off around 3 a.m. Sunday.

LISTEN: WBBM Newsradio’s Bernie Tafoya reports

Illinois State Police say we may never know.

A mother of five who was also raising five nieces and nephews was killed in the crash, along with the woman’s oldest son and her boyfriend. They were all inside the stalled Chevrolet Cavalier.

CBS 2’s Vince Gerasole reports the Cavalier was mangled almost beyond recognition after being hit from behind by a Toyota Highlander.

Killed were Derrick Young, 19; his mother, Latoya Williams, 35; and her boyfriend, Jermaine Garner, 27. All were pronounced dead at Roseland Community Hospital.

Williams has worked for UPS for more than 13 years and was raising 10 children — five of her own, and five others she took in for a cousin facing tough times.

“She always would say that ‘I do this for my kids. I want my kids to see something other than what they see every day.’ So she worked to provide for them so that they could have better,” Williams’ niece, Sheena Ray, said.

Outside her Pullman home, Williams’ grief-stricken family was consoling one another on Sunday. They were concerned for her children, ages 13 to 17, as well as the younger nieces and nephews.

“He was going to college, but he chose to get a job so he could help his mom out and we would all just tell him how proud we was of him,” Ray said.

Garner had also worked for UPS and only recently began dating Williams. Outside his Calumet City apartment, neighbors said he was the kind of guy you could rely on.

The driver of the SUV, a 64-year-old man, was not cited for any traffic violations, as police said he could not see the stalled Chevy in the dark because it didn’t have any lights on. His 38-year-old daughter, who was a passenger in the SUV, suffered a minor injury in the crash.

Illinois State Police said there was no that indication drugs or alcohol played a part in the crash.

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