@flouncyfanny 

I think Dylan would protect his Daddy, no matter how mean his Dad is. He is a young man who clearly has a lot going on, but he would want to protect his parents I think.
The dressing table belongs to Tom I am sure. I do not recognise the bottles of smelly stuff, but the lining up, regimental organisation of personal grooming items fit with what we have seen of him. Plus it is not a feminine table, and is on his side of the bed. Kate is very feminine.
We have not pointed the finger of suspicion at the young cop. Both Dylan and Steve would be protective towards him, he is almost everywhere, but remains almost invisible. His girlfriend features quite a bit too. Perhaps he is DTs love child and wants vengeance.