Michigan State Police are looking for the driver of a pickup truck involved in a crash on I-75 in Hazel Park that has left a woman's family grieving over her death.

Police said witnesses told them a 1998 Cadillac and a GMC pickup truck were speeding southbound on I-75 Tuesday evening -- in what appears to be a road rage case.

The Cadillac lost control and flipped near Woodward Heights Avenue.

The Cadillac's driver, 40-year-old Stacie Nicole Pennington of Harper Woods, was ejected from the car. She died at Beaumont Hospital in Royal Oak.

The pickup truck kept going. It’s described by police as white with tinted windows and the new “Pure Michigan” license plate. There isn’t a description of the pickup truck’s driver.

In an interview with Local 4, Pennington's brother and sister described her as their protector and a great mother to her four children.

"Everything she did was for her kids," Pennington's brother, Jevon Cole, said.

Cole is making a public plea for the other driver to come forward.

“I need you to take responsibility for your actions. You were being selfish. You need to come forward," he said.

Police are asking for anyone who witnessed the crash to call 517-241-8000.