No it doesn't mean that. But there's a big difference between Brettly and Nick Holbert - Brettly wasn't a convicted sex offender who had attacked a female in the past (and, speaking to Holbert's former crime against the 5 year old, there are what are called situational sex offenders who are not pedophiles, but will attack women of any age given the opportunity).
I believe in being very circumspect in these cases, and not casting suspicion unless something concrete points in a person's direction (I didn't suspect Brettly at all). Holbert's record, LE statements about him and Kelli's family strongly suspecting him all make me consider him a very strong candidate for being responsible for what happened to Kelli.
Also, Xavier, here's the story on the crime Holbert was convicted of:
http://www.wral.com/news/local/story/103731/
^________________________________^
It didn't happen behind the bar (Holbert hadn't lived there too long) but at the girl's house. I do think it could bear some semblance to Kelli's case because he attacked the girl knowing the finger would be pointed right at him if it was found out - he really couldn't control his impulse. Same thing if he's responsible for what happened to Kelli - he would know the finger would point right at him again but he couldn't stop himself once again.