The victim “flagged down a passing vehicle to use the driver’s cell phone around 3:20 a.m. in the 1900 block of Bickford Ave to call 911,” Snohomish County Sheriff’s spokeswoman Sheri Ireton said in a statement. “She reported that, as she was walking to work, a male unknown to her pulled her down to the ground, pulled off her pants and underwear, and started to assault her.