Giving officer Stevens every benefit of the doubt, it’s purportedly a picture of the “classic” triangular UFO, black with white lights in each corner and a red one in the middle. The squiggles and the double image are supposedly to to his hand shaking when he took the polaroid picture.
OK.
It’s kind of hard to dismiss sightings of enormous things (”it was the size of a football field!”) - when many people actually call up 911, etc., over it...
NUFORC is kind of interesting to read: