Anybody can do what they like with photos of the scene where they were assaulted.
It's not the victim's fault that somebody else sold those photos. And even if it were, well, the attacker shouldn't have attacked them.
Why would the victim of a domestic assault want to attend the funeral of their abuser?
Why would the family of an abuser who are busy painting their relative as a latter day saint invite the victim of their family member to a funeral?
Why would a victim of domestic abuse risk attending the funeral of their abuser when there could be a potential risk of attack (verbal or otherwise) from both the family members of their abuser but randoms - and also having cameras shoved in their face or from half a mile away to make sure he looked suitably unhappy/guilty, ready for a big photo online for randoms to say 'the hypocrite, it's his fault, how can he show his face?', 'He's only there for the photos', or 'Dramatic scenes as fight breaks out at funeral', etc, etc.
IIRC, the photos you describe as 'staged' were taken from a huge distance with a massive telephoto lens the other side of the world. And he was perfectly entitled to date somebody else - even had they been married, he'd have been entitled to do that, as marriage vows only last until death - as they had only been dating for six months, why should a victim of domestic abuse, no matter what the abuser's psychiatric history or level of intoxication on drugs and/or alcohol was, be expected to don Victorian Mourning attire and take a vow of celibacy?