Lookout Lock Cam 

This app basically works by taking a picture with the front-facing camera on your smartphone anytime someone enters in an incorrect password into the lock screen three times. Then Lookout will take that picture and e-mail it to you.

You can watch a video of the app in action here: 

You can also read more about the specifics of the release in the official Lookout blog, and you can also download the Lookout app on Google Play here: Lookout Security & Antivirus