I wonder who Hannah customarily confided in about problems in her life? Her dad seems to feel they had a pretty strong relationship, so maybe there was a lot she confided to him. It wouldn't be unusual because he was far enough removed from her problems that her secrets would feel safe with him. In some of the later articles, I also had the impression that JT has an idea who Hannah's killer might be (maybe not by name, but recognizing his/her association with Hannah).
Also, I'm curious about Hannah's siblings but can't find anything about them in MSM. I'm not going to sleuth them; just curious about their ages and Hannah's relationship with them. If her siblings, or one sibling, was older than Hannah did she confide in that sibling? Would she have told her sibling about someone who was harassing her? If so, her sibling may have confronted the person. When my older sister and I were younger, I remember that happening at least once. Even thought it was only a verbal confrontation, the other person and their friends were peeved at me (and I only confided to my sister when she saw that I was upset and asked what was wrong). Anyway, a scenario such as this could have resulted in Hannah's killer (possibly a classmate or neighbor who rode the school bus) seeking retaliation.
If Hannah had a younger sibling(s), on the other hand, was Hannah their confidante? Maybe a younger sibling was being bullied and Hannah confronted the bully, who then targeted Hannah, possibly soliciting help from an older sibling or friend who was bigger than Hannah.
Did Hannah's siblings go to the same school and ride the same school bus? Did any of them (Hannah and/or her siblings) associate with other kids in the neighborhood? Again, not looking to sleuth; just curious if one of Hannah's siblings might hold the clue to her murder.
I've also wondered if a teacher may have been Hannah's confidante. Did she relate to a teacher personal problems she was having with a schoolmate? Did a teacher recognize that Hannah was having problems and refer her to the school counselor? The behavioral problems Hannah seemed to be having at home may have been her acting out due to conflicts at school. I would think a teacher or counselor, though, would come forward with any potentially helpful information.
According to the article below, potential witnesses have been uncooperative, causing the investigation to stall. Why? Are other students being intimidated by an individual/group of kids at school/on the bus? I hope there are other avenues LE can explore to find Hannah's killer(s). What DNA evidence do they have? I don't want this to become a cold case.
http://www.11alive.com/news/article/260495/40/Hannah-Truelove-murder-investigation-stalled