Watching Indiana Jones right now, and Marians comments like "I was just a child" and Jones' falling out with her father seem to indicate that Jones fondled a child in the story. Which... uh. What the hell? It's not even like a big part of the plot, it's just thrown in
You can just say "rapist"
It's best to include as much information as is practical when discussing a person's crime, especially when it's mitigating information, and especially when it's all speculation anyway.