Gaslighting is said to be about manipulating people using psychological means so they doubt their own sanity. I could say no need to in your case, you already display such tendencies. That would be a joke. You believe what you wish. I am not hear to convert unbelievers. I am merely arguing that the LM case IMO may be a MOJ, nothing sinister or trouble making in that.
I think that LM got a raw deal because public opinion had him guilty on circumstantial evidence only before the trial began. Small town attitudes and an unwillingness to embrace other options helped seal his fate.
There is a world beyond Newbattle and Easthouses and there are lot of 'nutters' out there who may enter your area and do nasty things. It happens all over the world. What makes you think that such things cannot happen where you live.