Jason J. Dolman, 31, and Riza P. Ysulat, 36, were missing for weeks. On Jan. 23, police found their car in the river, off Riverview Road, west of town. Their bodies were inside. Both had drowned.
The Snohomish County sheriff's Collision Investigation Unit's case remains active, detective Doug Gold said last week.
Most recently, laboratory tests results came back showing no evidence of drugs or alcohol being involved, he said.
Investigators also had the car undergo a mechanical inspection. No problems were found that could have caused the crash.
Detectives checked weather records, too. There was nothing to indicate that roads would have been icy at the time of the crash.
Most likely, the crash was an accident, possibly caused by a distraction inside or outside the car, Gold said.
"Why we may never know," he said.
Rikki King: 425-339-3449; firstname.lastname@example.org
More Local News Headlines
3-D mammograms more likely to detect breast cancer 9:03 a.m. Public Disclosure Commission calls Eyman's violations serious After audit, Lynnwood is fixing its financial problems Corey McCrea, 33: Snohomish skateboarder had found his gift Students impressed by career opportunities at Manufacturing Day Complaints say that commerce officials helped PUD score a grant Activists pitch plan to divide Everett into districts Last stop for the circus elephants in Everett
Our new comment system is not supported in IE 7. Please upgrade your browser here.