PORTLAND, Maine (AP) — A Maine sheriff's department is adding facial recognition software to its investigative toolbox.

Beginning Monday, the Cumberland County Sheriff's Department will begin using facial recognition software to determine if people are who say they are.

Deputies will be able to take a digital photo of someone and have a computer program compare it with a database of photos of people who have previously been booked at the jail to determine if there's a match.

The Portland Press Herald (http://bit.ly/NndlJn ) reported that the software can help deputies determine if someone is lying about their identity.

The American Civil Liberties Union of Maine says it objects to the use of the technology because it's in its infancy and is notoriously unreliable.