Prosecutors say a 68-year-old man waited in a parked Toyota Camry, struck an 88-year-old woman, then allegedly hit two more pedestrians later the same day.

SEATTLE, Wash. — A Bellevue man accused of waiting in a YMCA parking lot before driving into and over an 88-year-old woman now faces a murder case that prosecutors say stretches beyond one crash, after investigators linked him to two more pedestrian collisions in Tacoma later that day.

Mark Alexander Adams, 68, was charged in King County Superior Court after the Feb. 28 death of Shinko Oshino outside the Bellevue Family YMCA on Bel-Red Road. The case matters now because investigators say surveillance footage, witness accounts and phone data turned what first appeared to be a fatal hit-and-run into an allegation of an intentional killing, and because a judge later ordered a competency examination as the case moved into its early court stages.

According to charging records described by local outlets, the white Toyota Camry entered the Bellevue Family YMCA parking lot at about 6:45 a.m. on Feb. 28. Cameras showed the car circling the lot several times and returning to the same stall, backing in with its front facing the lower lot. Roughly an hour later, at about 7:40 a.m., Oshino was walking through the lower parking area when the Camry pulled out. Investigators say the vehicle turned to line up with her path, accelerated and struck her. Bellevue police were dispatched at about 7:41 a.m. A witness later told investigators he first thought what fell from the hood was “a fake body,” while another said the car kept moving fast with the woman on it. Bellevue firefighters tried lifesaving measures, but Oshino was pronounced dead at the scene.

Prosecutors say the impact carried Oshino about 120 feet on the hood before the car braked, causing her to fall in front of it. The vehicle then accelerated again and drove over her without stopping, according to the probable-cause account summarized in local reports. Police said YMCA staff helped identify her, and identification was also found near her body. Adams was later linked to the Camry through the license plate and other investigative steps. Local reporting on the charging documents says there is no stated motive in the court record made public so far. The same records described the car as being used “as a weapon.” Authorities also alleged that after leaving Bellevue, Adams drove south and was tied to two Tacoma hit-and-runs, one around 10 a.m. and another at 12:38 p.m. One of those victims suffered a spinal fracture; the extent of the other victim’s injuries was not publicly detailed.

The Tacoma allegations broadened the case from a single fatal crash to what prosecutors described as a pattern of conduct in one day. In one Tacoma incident, court records summarized by local TV outlets say a skateboarder reported the driver slowed down and sped up to match his pace before striking him as he tried to move out of the roadway. In another, surveillance video reportedly showed the Camry circling a gas station property. Prosecutors say the driver first appeared to target a truck driver walking back to his vehicle, then looped around and struck a different pedestrian from behind. That victim went over the hood and windshield, and records say the car then reversed toward him while he was on the ground before he rolled away. Those details, while separate from the Bellevue homicide charge, helped prosecutors argue for high bail and stricter conditions.

By March 1, authorities had arrested Adams in Port Townsend after investigators used phone-location data and other evidence to trace his movements, according to local reports. Prosecutors sought $5 million bail and no-contact conditions involving Oshino’s family and the Bellevue YMCA property. Coverage of the March 9 arraignment said a judge ordered a competency examination instead of moving directly to the next ordinary trial step. Local reporting said the next hearing was scheduled for March 24. Public accounts of the case have also referenced earlier court history involving Adams, including a family protection order and an old escape from Western State Hospital, though those matters are background and not proof of the current charges. The murder case itself still turns on what prosecutors can prove about intent, identification and Adams’ mental competency to proceed.

The setting added to the shock of the allegations. The Bellevue Family YMCA is a routine stop for morning workouts and older adult programs, and the attack was alleged to have happened just as the lot was beginning to fill. Witnesses described seeing the woman on the hood and then on the ground, a sequence that transformed the scene from confusion to horror in seconds. Casey McNerthney, a spokesperson for the King County Prosecuting Attorney’s Office, said the case was “incredibly difficult” for the victim’s family. Prosecutors also called Adams a danger to the community in asking that he remain jailed. Even so, key questions remain unanswered in public records, especially why Oshino was targeted, whether she and Adams had any prior connection, and what additional charges may come from the Tacoma incidents.

As of April 1, the homicide case remained in its early stages, with competency issues and any later charging decisions still shaping the next major turn in court.

Author note: Last updated April 1, 2026.