Initial medical tests showed the man's blood sugar was low enough to cause a possible loss of consciousness, according to court papers.
Police allege the man was driving the wrong direction on Evergreen Way about 10:30 a.m. when his Lexus ES 300 struck the deputy on the motorcycle just north of 112th Street SW.
The deputy, 48, was taken to Harborview Medical Center in Seattle.
The deputy, who's been with the sheriff's office for 10 years, was listed Friday in stable condition, Everett police spokesman Aaron Snell said.
The deputy suffered possible broken bones, according to a search warrant filed Thursday.
The Everett man was taken to a local hospital after the crash and later was released. No arrests have been made, Snell said Friday.
"At this point in the investigation, we haven't ruled anything out," he said.
Everett collision detectives are investigating the crash as a potential case of vehicular assault, court papers show.
The man's license already had been suspended due to another collision. Details on that crash weren't immediately available Friday. The man has no known felony history.
On Thursday, detectives obtained a judge's permission to collect a blood sample from the man.
The sample will be submitted for forensic testing by the state crime lab.
Rikki King: 425-339-3449; firstname.lastname@example.org
More Local News Headlines
Lake Stevens U-pick blueberry patch may have to close to the public Self-described gang member charged in Everett slaying of ex's boyfriend The forever session: In which Republicans are winning Leque Island levees will be removed in effort to create salmon habitat Loaner life jackets disappearing from parks around county Doris Hill Jelinek receives high school diploma on her 100th birthday Washington students seem to find new tests more challenging 11:26 a.m. Illegal fireworks spark Lynnwood blaze, 2 arrested
Our new comment system is not supported in IE 7. Please upgrade your browser here.