Seems police have a good working theory on what happened, but not the evidence they feel will hold up in court to get a conviction. While I want someone arrested and charged with Tom's death, I want the right perp, and I want the conviction!
While LE can't bring Tom back, they can bring a conviction! I wish the wheels of justice moved faster, but if Tom's parents are OK with what LE is doing, then I have confidence as well. Afterall, it's THEIR son!! So you know they want a conviction! And they know more than we know.
Case isn't cold. I can't imagine living with the fear that at any moment my actions were going to come to a streeching halt when LE arrests! Any minute could be the minute! Every day someone is watching you, waiting for that moment to make that arrest. Waiting on results from the lab, or that one tip that solves the case. Nothing is completely hidden. No one is going to hide your secret forever. At some point, you'll pissed off the person that knows the secrets, and then what? They'll go to police with everything, and you'll be left alone! Yup, time on LE's side. They don't have to rush to make an arrest! They're continuing to investigate and gather those pieces to seal a conviction. The stress of that would drive me bonkers!