This case is really puzzling me as it is a number of you and confounding various of my expectations. The second man being released is to be honest very strange. It makes it look like they have just arrested a couple of close contacts of Sabina, and seen what they could get out of them as I think some people suggested, recent exes and/or guy she was meeting. I hope they had more to go on than that.
I can’t work out what the “orange object” could be. My initial thought was that the hands looked bloodied. But if that’s wrong, which it sounds like it is, perhaps this is something they think was found or or near Sabina’s body, as was suggested above something that wiped the implement used to attack her or clothes taken from Sabina as a trophy. Other options, maybe mask? As I understand it, Sabina did not customarily wear the hijab so assume she wouldn’t be wearing that for a night out.