His GF's sister, but yea, you don't just kill your potential brother-in-law for no reason, lol. There are a few angles though - he could have been from a rival gang, or he was beating his girl, or he knew about Hernandez's past dealings, etc. But, there weren't any open cases on anything prior to Lloyd, so that shouldn't have been a big enough threat to kill him, you know? He wasn't being investigated for anything else. Also, you'd have to ask HOW Lloyd knew about that stuff(if any) without implicating himself as an accomplice of some sort....?