Neither Jason J. Dolman, 31, and Riza P. Ysulat, 36, have shown up to work since then. Both of their cellphones have been turned off, Snohomish County Sheriff's Office spokeswoman Shari Ireton said Tuesday.
Medications and other personal items were left behind at their respective homes.
Dolman and Ysulat were dating. Investigators are looking for anyone who may have seen either Dolman or Ysulat in the Snohomish area since Jan. 8 or the vehicle they were driving, a red 1999 Mitsubishi Mirage. The Washington license plate number is AJN4025.
Anyone who has seen Dolman, Ysulat or the car is asked to call the sheriff's office tip line at 425-388-3845.
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