Complex sentence: Also, some victims were known to engage in an underground party and pornographic movie scene; several writers have postulated that the victims might have known each other, and that the killer may be connected to this scene as well.
Split into simpler sentences: Also, some victims were known to engage in an underground party and pornographic movie scene. Several writers have postulated that the victims might have known each other, and that the killer may be connected to this scene as well.