From what I know Richard (Ludvig) is straight, or at least he identifies as straight, so therefore he's straight. I'm not saying he didn't have hookups, flings, situationships, rendezvous with fem boys/trans girls/t girls etc. gay/bisexual does not make, unless he identifies and came out as openly bisexual which from what I know he hasn't.
Also he is most likely going to be convicted of the murder if not by grand jury, he's going to most probably take a judge plea deal, and I can see him getting 10 years with probation/parole, and I only say that as unfortunately he has a damn good lawyer, (Mark O'Mara) who has a good track record of protecting his clients so yeah.
We will probably never know the full details of the murder, other than we know that Richard/Ludvig was living with the site master, and I know before the murder happened, when the site master of TGS was upping his game with production, getting a lot of Russian/foreign guys to model in the later years, people were accusing the site master of grooming/molding and sleeping with some of the guys and there is rumors that the site master did "SA" one of the guys who modeled for TGS in the later years, but this is very much tabloid gossip, and there is no evidence of this.
There was gossips of who the first TGS guy was going to come out with a "Me Too" story. So in that regard Richard/Ludvig might use this information as a defense, that the porn company/TGS was under abusive management and that led him to the murder, but I don't know. The point is he did murder the sitemaster, and that's that. There is no excuse for that, unless it is a self defense case, which doesn't seem so from what we know about the details of the matter, but yeah.
It's a shame all around. But I think we will always have unanswered questions.