Actor Tom Cavanagh, who starred in CBS' "Love Monkey," will play former King County Sheriff (and now congressman) Dave Reichert in an upcoming Lifetime Movie Network four-hour miniseries on the Green River killer. The series - run date not yet announced - is based on Reichert's book, "Chasing the Devil: My Twenty-Year Quest to Capture the Green River Killer," the Hollywood Reporter says today. LMN's adaptation, called "Desperate: The Search for the Green River Killer," will follow two teen girls trying to escape their rough life at a Seattle-area trailer park who end up on a collision course with Gary Ridgway, the homicidal twerp who ultimately confessed to 53 serial killings. Cavanagh, who also starred in NBC's "Ed," says the Reporter, "will portray Reichert, who navigated a number of suspects and false leads over two decades until he zeroed in on the unassuming Ridgway." Well - until Reichert and his department zeroed in on Ridgway, thanks plainly to scientific advancements in DNA testing - finally catching a killer who'd been on their suspect list for two decades. We're sure Hollywood will mention that.