It's too late for me to dive into the PC or FC, so I'll let you back the "roomates qualify under DV" with a cite from Texas code.txinvestigator wrote: He was not screwed over by the police. Roomates qualify under DV, and the police are REQUIRED to take action.
Meanwhile, I'll point out that the Lautenberg Amendment defines "domestic" like this:
"has, as an element, the use or attempted use of physical force, or the threatened use of a deadly weapon, committed by a current or former spouse, parent, or guardian of the victim, by a person with whom the victim shares a child in common, by a person who is cohabiting with or has cohabited with the victim as a spouse, parent, or guardian, or by a person similarly situated to a spouse, parent, or guardian of the victim."
Simple roomates would not qualify for DV under federal law. And in Texas, even same-sex couples wouldn't qualify, since they can't be "person(s) similarly situated to a spouse".