Heather Lee was convicted of causing a June 5 crash that injured nine people, including two children.
Prosecutors originally charged Lee with two counts of vehicular assault, which could have landed her a year in jail, but toxicology results forced prosecutors to later amend those charges.
Court documents show troopers couldn't get a search warrant for a blood sample until three hours after the crash. By then, Lee tested at 3.8 nanograms of THC, which is the active ingredient in marijuana that gets you high. The state limit is 5 nanograms of THC.
A WSP toxicologist recently told the Everett Herald, "Although the level was presumably higher three hours earlier, we cannot determine what the exact level was at the time of the incident."
Prosecutors say Lee admitted to smoking marijuana on the day of the crash to treat her anxiety. At her sentencing hearing, she promised to never smoke pot again.
Eleven-year-old Levi is one of children who was injured in the crash. He broke the bones around his eye, as well as his thumb and his wrist. Like the others who spent days in the hospital, he still in a lot of pain. Levi said he hopes Lee lives up to her promise.
"I don't think it's good," he said. "It's bad for people to do."
Lee was sentenced to three months in jail, but she's already served that time while waiting for trial. Lee's own two children were in her backseat at the time of the crash. They're now in state custody.