Sadly, there are a lot of JMs in the world. But most of them have managed to stop short of killing anyone, Or even been under suspicion of a murder, disappearance or rapes. Though, like JM, they may well have had something of the sort in their past. The fact of the matter is that no woman has filed a complaint with LE or sued him in more than 10 years. The cases in college were not on file with LE, but were private matters within the university communities. There are too many men who prey on women who are vulnerable due to drink,drugs, depression, and most do not file charges, because they often feel responsible for the events of the night before, even if they feel they were taken advantage of. And some may have wanted the experience. JM likely was able to do well in this regard.
Also, there is word out there that he had a live in girlfriend for the last several years, up until recently. That may have kept things from building up to a terrible tipping point.
Really, nothing that we KNOW for sure he did is a huge crime and is unlikely to be make it to court without more evidence than we have. So what that he picked up Hannah? She's an adult. She willingly went with him. That he helped her to his car when she seemed to look like she was in bad shape as noted by the door checker at Tempo, so what? Had Hannah not disappeared, it would not have been a big deal at all. Something the checker and others have seen time and again. That she was in his car..that's fine too. So he offered her a ride. She accepted, most likely. It's after this point that things start getting shaky because Hannah has disappeared, and we aren't getting any help, info from JM . This massive search is taking place, parents and other loved ones of Hannah are grief stricken, Hannah could be hurt, dead, in trouble and the last person tracked to her won't give squat about where she went with him and what happened. At least that is what we see. And JM's attorney is not coming out with any statements to the contrary.
LE doesn't share a lot of info, so there could be critical evidence in the car that shows that Hannah was not just dropped off, hale and hearty right after getting into JM's car.
In MH's case, not a thing connected JM to her. No one has placed him with MH up till now when some forensic link taken from Hannah Graham disappearance evidence apparently matches some evidence in the MH case. It's the first JM has been linked to MH.