Weird trail and UFO appeared over Windham, Maine

On September 13, 2012, a paramedic was in duty in Windham, Maine, when he caught a photo of a mysterious trail in the sky. Near that, there have a strange luminous UFO.

Witness report:

My paramedic and myself (an EMT) were on duty covering a youth sports game. We were stationed at the High School field when we noticed a trail going straight up. So thinking this is a very strange happening, I took some pictures. I didn't notice this when I first took the pictures in 2012, but I was showing someone the pictures last night and found this object that appears in quite a few of them. This, what ever it is, is never in the same place twice. What could it be??