Dead and Gone by Joanna Schaffhausen
This is another in the Annaliese Vega series. Anna's boss assigns her to investigate the death of Sam Tran, who was found hanging. Sam was an ex cop/current PT, who was a personal friend of the boss's. Anneliese starts by investigating the 3 cases Sam had been working on when he died, which opens a whole can of worms. At the same time, Annaliese's niece, Quinn, who is a freshman at college, is receiving disturbing text messages, then her roommate, Natalie, disappears--and the campus police won't take it seriously. So Annaliese gets drawn into that very convoluted situation. And Annaliese realizes that she might be pregnant. There's a lot going on, but it's a gripping tale.