A Placerville man is behind bars after posting an online ad for a young "sex pet."

Shawn Roediger, 26, was taken into custody Monday after an alleged weeklong exchange with detectives posing as a 13-year-old girl.

Placer County Sheriff's Spokeswoman Dena Erwin says they found the ad during a routine sweep and that Roediger is facing $100,000 bail and a host of charges.

Rodediger faces charges of attempted lewd and lascivious acts with a child, communicating with a child for purposes of committing a sexual act, and distribution of "harmful matter" to a minor.

"He sent photographs," Erwin said. 

Erwin says the first thing detectives do when responding to these type of ads is indicate that "they are underage."

In this case, she says Roediger was quite pleased that he found someone.