Breanna Gomez has been missing from her Wisconsin home since Dec.23 after getting away from police during a high speed car chase, ABC News reported.

Gomez was recently released from a detention center where she served six months and is believed to have helped steal a car and on her way to California with her boyfriend, Spencer Linville, 16, and two other teenage males, according to ABC.

The 15-year-old girl went missing from her home in Eau Claire, Wisconsin, and left her insulin behind in the first car she ran from police in, ABC reported. Jerry Carpenter, Gomez' grandfather said he is worried about her health due to her insulin dependency.

"Her insulin was left [in the car]. If she doesn't have that, she will die," Carpenter told ABC.

The car chase spanned two counties on Thursday night and police believe the three teens abandoned the first car and stole a light blue Chrysler Town & Country minivan which they are now crossing the country with, according to ABC.

Steve Reams, a Weld County Sheriff's Office spokesman, told ABC Gomez has had numerous problems with police in the past and has been cutting classes, according to her grandfather.

"She's been troubled for a while. We've been trying to help her," Carpenter told ABC. "She was supposed to come and see us on Sunday [and] there was even talk of placing her with us."

Carpenter added that the teens she is with should "drop her off at a medical facility, a police station, anywhere," ABC reported. Gomez is described as having black hair, is 5-foot-6 and weighs 150-pounds and authorities urge anyone with information on her whereabouts to come forward.

"We love her and we just want her to get treatment," Carpenter added, according to ABC. "Of course she is going to have to pay the price for whatever she's doing. She's responsible for her actions, but that does not mean we love her any less."