So, let's take a close look at the FBI image of Lovelady, particularly his hairline, because I say the FBI doctored it to make match Dooman's.
The best comparison we have to confirm the authenticity of this is the image of Lovelady taken by Mark Lane.
Those images were both taken in the winter of 1964. Some people try to claim that the Mark Lane image wasn't taken until the winter of 1965, but I doubt it. In any case, it could not have been later than that because it was included in Rush to Judgment which came out in early 1966.