PORTLAND -- The boyfriend of the suspected driver in the deadly hit-and-run in Portland last March was arrested Wednesday, the day after her brother was arrested as well.

Christopher Michael Rhea, 28, of Lake Oswego, was arrested at his home Wednesday on accusations of hindering prosecution and tampering with physical evidence. Police said he was with Ashley Chavez when she was arrested in Bellingham and may have helped her flee the state after she allegedly struck and killed a pedestrian with her car. Police do not believe Rhea was in the car during the hit-and-run.

The victim, Nancy Schoeffler, was found lying in the road on West Burnside at 11:20 p.m. on March 31, 2012. She was deceased when medical crews arrived. Investigators said she was the victim of a hit-and-run and tips eventually led them to Ashley Chavez and her car.

After a multi-state search, Ashley was arrested in Bellingham, Wash. last Friday and waived extradition to Oregon Wednesday. Portland police said she will face several charges, including manslaughter, hit-and-run, tampering with evidence, and DUII.

Ashley's brother, Josh Chavez, 24, was arrested at his home in Sherwood Tuesday. He was charged with hindering prosecution and tampering with evidence. Investigators told KGW they believe Josh helped try and cover up the crime and the vehicle involved.

Police believe Angela Kaps Collins was the passenger in Ashley's car when the hit-and-run occurred. Collins was arrested on Memorial Day for hindering prosecution and tampering with evidence. Police said they found Ashley's damaged vehicle hidden on Collins' Corbett property.

A neighbor told KGW she had seen people working to repair the car on Collins' property during the night.

Police said there still could be even more arrests ahead, as this complicated investigation continues to unfold.

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