He had no job.
Maybe he was a wealthy, trust-fund Democrat?
We don't need to know what he did to her. They should keep that classified.
But, parents want to know how he was attracted to her. People want to keep their kids safe, and if there is something that can be learned from this, that can be avoided with their own kids, then people want to know that.
Unfortunately, there are things that we will probably never know. That seems to be typical of many high-profile cases. Why the authorities hide things from the public (other than during an on-going investigation) is a mystery.