Louise Letrush is at this very moment standing by Whiterun stables, earlier in the game he hired mercs to go after my character, after dispatching the mercs to oblivion my character decided it was time to pay a visit to Letrush and let him feel some steel, but wait!, whats this!?, he cannot be killed, he is set essential!, oh puhlease, the quest with him is completed, I got the freaking horse, it's mine!, now why can't I kill this freak?

there are some very weird people given the no kill status.

I wanted to kill off the black-briars but couldn't.

they are essential to the thieves guild questline

Yeah Op I have to agree with you it's kind of ridiculous. What's worse is on my game Louis is bugged and there are three copies of him standing in front of the stables.

I've seen this, he gets duplicated in the save file from what I can tell, if your on pc you can get rid of two, just check the Ref in the console, if it begins "ff" just markfordelete then save.

It's become a strange scene in front of the stables with 3 louis' and the chick from Azura's shrine standing with them with her arms up praising them. Maybe she us duplicating then with foul magic lol

What's really ridiculous is I let him keep the horse and now there are 4 of him at the Whiterun stables, all unkillable....WTF? There used to be 3 but an extra one appeared recently.

Before anyone says it, no I haven't abused the console. I only ever used it once to get back the Thieves Guild gear I stupidly sold.