Jurors deliberated for about two days before finding former officer Daniel Lavely guilty. His trial in Snohomish County Superior Court had begun on July 23. He will be sentenced next month.
During the trial, Lavely denied the charges and said the woman was high on drugs and propositioned him, then later accused him to "further her self interests." The woman has previous convictions for theft, possession of stolen property and making a false statement.
But jurors agreed with the prosecutor, who said Lavely abused his authority to take advantage of a homeless, drug-addicted woman.
According to the official police investigation, Lavely initially stopped the 28-year-old Seattle woman for jaywalking on Highway 99 in Edmonds on May 6, 2012.
The woman was released shortly afterward, but she was contacted again by Lavely later that evening on an unrelated call. This time, Lavely allegedly took temporary custody of the woman, put her in his patrol car and drove her to a remote location where the two had sexual intercourse, according to the investigation.
The woman reported the incident to law enforcement a few days later.
Lavely resigned from the force following the investigation.