Jessica C. Jones was shot in the head April 8 while inside her own garage. The 25-year-old was rushed to Harborview Medical Center, where she died early the next morning.
The victim's 25-year-old boyfriend, who has not been named, originally told police someone in a dark blue Dodge Neon shot Jones.
After speaking with witnesses, watching video surveillance and tracking down other leads, investigators realized the boyfriend's story didn't add up. They say a witness told Arlington detectives they saw the boyfriend enter the garage and then heard a gunshot on the night of the murder.
Police later found a handgun in bushes near the house.
Officers from the US Marshal Violent Offender Task Force took the boyfriend into custody on Monday. He was booked into Snohomish County Jail and will likely face a charge of second degree murder following a domestic disturbance and another charge of unlawful possession of a firearm.
Police say the suspect is well known to officers and has prior convictions for assault, robbery, burglary, and unlawful possession of a firearm.