Annoying helicopter hovering over Lino Lakes

Here is a blurry photo I took of a helicopter hovering over my house. It was going back and forth over the same block, for at least a half an hour.

Boy, was this annoying at 1:30 A.M. I wondered if it was a training excercise, or a prison break from the Lino Lakes State Prison, or some sort of Homeland defense drill. I haven't been able to find anything from the local news.

People noted that you can't see much in the image above, so below is another version, where the brightness is bumped up and contrast is bumped down. It is not a UFO.