Police have arrested one suspect in the hit and run of a 63-year-old woman who was killed at the end of March while on a nighttime stroll on West Burnside.

Angela Dawn Kaps-Collins, 43, was arraigned Tuesday on misdemeanor charges of tampering with evidence and hindering the prosecution, a felony.

Police believe that Kaps-Collins was a passenger in the vehicle that killed Nancy Margaret Schoeffler. They're looking for the suspected driver, Ashley Chavez, 22.

The case was cracked thanks to several anonymous tips to

, which offered a $1,000 reward, police said.

Schoeffler's body was found on

about 11:30 p.m. on March 31.

Norm Frink, chief deputy for the Multnomah County District Attorney’s Office, said the women were co-workers at

, a division of IBM based in Beaverton.

Police interviewed co-workers at the Seterus on Tuesday morning, but Chavez was not there.

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“She just happened to be on vacation,’’ Frink said.

He said both women were at a Timbers soccer game on Saturday, March 31, and were drinking before and after the game. He said that after Schoeffler was hit “there was a decision made to cover it up.”

“It was quite an elaborate scheme to hide the damage to the car,” Frink said.

Officials said the suspects had the car transferred on a flatbed truck to Kaps-Collins house in Corbett, and were in the process of having the car repaired when police served a search warrant at home.

Kaps-Collins was booked into Multnomah County jail Monday night and arraigned Tuesday afternoon in Justice Center courtroom No. 2 as her son Dreu Collins watched.

Kaps-Collins, dressed in blue prison scrubs, fought back tears and bit her lip as she conferred with defense attorney Gary Gedrose, who entered a not guilty plea on her behalf.

Judge Marilyn Litzenberger kept her bail at $200,000. Kaps-Collins is scheduled to be back in the same courtroom at 9:30 a.m. on Wednesday, June 6.

Her son declined to talk to reporters about the accusations against his mother.

Court records show that Chavez pleaded guilty in February 2011 to misdemeanor assault and served a year probation. In 2007, when she was 18, she was convicted of being a minor in possession of alcohol. She also has a speeding ticket on record.

Schoeffler's death shocked and saddened family and friends, who appealed to the public for help in April in identifying those responsible. Liz Callow, a close friend, said in a news conference outside the Traffic Division of Portland police that resolving the case wouldn’t bring back Schoeffler but would give loved ones some closure.

Schoeffler was a certified nursing assistant who cared for the elderly. She was killed walking her usual loop near her home.

Her family said she was all about love – not revenge – and would not want those who killed her to feel badly the rest of their lives.

"My sister had no resentment," said Jennifer Brathovde, who flew to Portland from Washington D.C. following the death of her sister. "We have no hatred for the people who did this."

Investigators said they were looking for two women who were seen arguing in a QFC parking lot on

– about two miles away from where Schoeffler’s body was found. They were next to a black sedan, said Sgt. Pete Simpson, a spokesman for Portland police. One of them was seen retrieving something from the car, which had a damaged hood and shattered windshield. Forensic specialists concluded that Schoeffler was hit by a 1996 to 2008 black Honda or Acura sedan.

They were described as short, with medium to heavy builds and were wearing caps, possibly with Portland Timbers logos. An appeal was later made at a Timbers game, asking the public for help in solving the case.

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