The Erie woman accused of using her car as a murder weapon is expected to plead guilty to third-degree murder Tuesday, her attorney tells Erie News Now.

Rebecca Frick, 24, was set to face trial on nine charges after police said she intentionally slammed her car into Michelle Muir, 38, following an altercation at the Shell gas station at E. 6 and Parade St. on Aug. 24.

Muir and Frick got into a verbal altercation over the couple's decision to tie their 10-month-old pit bull to a pole outside of the store, Muir's boyfriend said during Frick's preliminary hearing.

The boyfriend said he closed Frick's car door, and the couple then left. As they walked away, he said Frick followed them in her car.

When they reached the intersection of E. 6 and Wallace St., he said Frick struck Muir and their dog with her car and sped away.

Muir was rushed to UPMC Hamot, where she died of blunt force trauma to her head.

The couple's dog suffered some bumps and bruises.

Erie County officials restricted former Erie Mayor Rick Filippi's contact with inmates at the Erie County Prison in late August after he had inappropriate contact with Frick, sources told Erie News Now.