Jennifer Lyndsay Renn was found dead in the trunk of this 1986 Honda Civic in February 2004. ((CBC))

A special homicide team created to solve Calgary cold cases has laid its first charge, arresting a woman in a homicide dating back to 2004.

Police believe Jennifer Lyndsay Renn, 29, died four days before she was found on Feb. 18, 2004, in the trunk of a 1986 Honda Civic parked in a southeast Calgary impound lot.

On Monday, Calgary police announced they have charged Elizabeth Laverne Roberts, 33, with first-degree murder. She was arrested in the downtown area on Sunday.

Investigators from the homicide unit's unsolved team allege Roberts assaulted Renn in a northwest motel room, leading to injuries that killed her. They believe her body was taken from the room and placed in the vehicle.

On Feb. 16, 2004, Calgary police responded to a suspicious persons complaint and found the Civic being driven by a man who could not provide any vehicle registration documents, so they towed the car to the impound lot.

Two days later, a man who had been stabbed and beaten flagged down police in the 1200 block of Macleod Trail S.E. He said he had loaned his car to some associates and believed there was a body in it.

His information led police to the car, where Renn's body was found in the trunk.

The unsolved team was formed in the fall of 2007 to review and re-investigate old homicide cases in Calgary.

Roberts is scheduled to appear in Calgary provincial court on Monday.