Yeah but according to him, he was a "baller" and an "aspiring rapper/hip hop artist". She "dissed" (disrespected) him by expecting him to pay his own way. Violence is how many baller/rap artists deal with anyone who disrespects them. How dare she expect him to pay his way, why she ought to be glad to be in his company and just lay out the red carpet and finance his good time.
( I hope you know I am being snarky. But in the world that TS imagined he belonged in (rapper/baller/etc) people get killed for dissing other. Look at all of the dead rap/hiphop artists and all their feuds over the stupidest imagined slights)
Oh I am sure HM filled his head with stories of her famous daddy, her inheritance, the money she felt belonged to her and that he mom stole from her. I am sure HM told him how she would beat her mom to get her way. She surely got him all pumped up on expectations, and having to pay his way was simply unacceptable (and financially impossible) for him to do.
I want them both to be equally responsible. She did NOTHING to stop it, helped to cover it up and has shown no remorse. She doesn't care about anything but saving her own but and getting out and getting her hands on that money.
... and HM most likely either opened the locked hotel room door for an angry TS or HM gave TS a key card to the M's locked room.