I have an uneasy feeling that some of what has been now been reported concerning the "motive" for the crime may be partially true. I think it is possible that SvWM racially abused Tommy (sorry if I'm not popular for saying this) though perhaps not necessarily exactly as reported by HM. These things tend to come out in the heat of the moment and I expect the poor woman was at the end of her tether by that point. Besides, I imagine she despised TS's hip-hop gangsta culture. Also, wasn't SvWM shown to be calling HM names in one of the vines posted? However, this is NO reason to murder someone!
What I'm less convinced about is that SvWM "souveniered" hotel property all the time and would even consider taking a heavy glass fruit bowl home with her. Small items, maybe, but not something like that. Nowadays all high-end hotels have large notices in the room saying that if you take anything belonging to the hotel it will be charged to your hotel bill. They also offer you the choice of purchasing such items from the hotel shop. So, yes, I believe it was intended as a murder weapon.
Just where did the duct tape came from though? This has never been fully explained though and I presume/assume SvWM/HM brought it with them to Bali. Given the time frame between the arrival of TS in Bali and the murder there is no way that HM/TS could have gone out and bought it themselves. In my experience duct tape is not something that hotels routinely carry and it's not always that easy to find locally. It happened to us in Thailand last year when our suitcase got smashed. We had to make a special journey to a local hardware store to find something repair the case. I will remember in future to take duct tape on my travels!
I also question the bipolar claim made by HM. Maybe true, maybe not, but surely this could be verified by SvWM's doctor and/or family back in the U.S.A? This is not a condition that can be hidden easily but seriously, what real relevance does it have to the actual crime?
I do wonder whether the Bali police are really looking into the backgrounds of HM (violent past and character) and TS (various misdemeanours) or are they just taking the crime at face value, i.e. only concentrating on the events that happened on Bali? I suppose this will only be known when the case comes to court.