Updated at 9:43 a.m. Saturday with the more details about the victim.

Four teenagers tried running across eastbound Interstate 20 in Grand Prairie early Friday, police say. One of them didn't make it across safely.

The victim has been identified as 18-year-old Ryan Sherman by the Tarrant County Medical Examiner.

Sherman reportedly had a child on the way, according to a GoFundMe page that described him as a loving person.

"He just had a recent birthday and turned 18," the page said. "Ryan could not wait to be a father, especially after losing his own father eight years ago, and promised he was going to give his child the life he always wanted."

The money raised will go towards burying him, and any remaining funds will go towards his unborn child, the GoFundMe page said.

At least two vehicles hit Sherman about 4:30 a.m. as he stopped to pick up something -- possibly a flip flop -- on I-20 near State Highway 360, police spokesman Lyle Gensler said.

Witnesses told police they saw the other teens huddling in the parking lot of an LA Fitness, looking over at the people who stopped to help the teen who was struck.

The teens ran south, possibly to a residential area, Gensler said. Police hope they will come forward and help with the investigation.

"We appreciate you coming forward and just giving us your side of the story as to what happened and why it happened," Gensler said.

Anyone with information about the crash may call Grand Prairie police.

Major investigation underway in Grand Prairie. @GrandPrairiePD says 20 East will be CLOSED for the morning rush pic.twitter.com/oYqYvJ06l5 — Madison Sawyer (@MadisonSawyerTV) June 2, 2017

Breaking News Producer Liz Farmer contributed to this report.