The Grays Harbor County sheriff's office says a neighbor who came to collect the mail while the owner was away surprised a man and woman having sex on the floor Monday.
Chief Deputy Dave Pimentel says the naked couple fled, leaving behind the camera, which had been stolen elsewhere.
Pimentel said Tuesday that deputies who checked the video recognized the couple from previous contacts.
The 39-year-old woman was arrested for investigation of burglary. An arrest warrant was issued for the 31-year-old man.