Correction appended

A case involving a Multnomah County corrections deputy on paid leave since July amid allegations of sexual assault is under review by the Oregon Department of Justice, authorities said Wednesday.

All reports from a Washington County Sheriff's Office investigation involving Multnomah County Deputy Dwight Richey were recently forwarded for review and a decision whether charges are filed is expected in the next couple of weeks, according to Washington County Deputy Jeff Talbot.

Richey is accused of sexually assaulting a woman in Multnomah County while off duty in May, said Washington County Detective Robert Rookhuyzen. The woman reported the alleged abuse the same month.

Rookhuyzen said Richey also is being investigated for "on-duty improprieties" that he said he couldn't elaborate on.

Multnomah County Sgt. Brandon White said Richey remains on paid administrative leave and the Multnomah County Sheriff's Office would be conducting an internal investigation of the allegations after the criminal investigation is over.

Richey faces no criminal charges.

The Multnomah County Sheriff's Office previously told The Oregonian/OregonLive that Richey has been on leave since July 11. He is a corrections deputy who works in the sheriff's office court services unit, which includes deputies assigned to the county courthouse, justice center and juvenile justice center.

Note: An earlier version of this story misidentified the agency reviewing the case due to a source's error.

-- Everton Bailey Jr.

ebailey@oregonian.com

503-221-8343; @EvertonBailey