Complex sentence: Robert Hansen, a serial killer from the area, admitted that he was responsible for the victim's death in 1984, claiming that she was a dancer from a local bar or a prostitute, and his first murder victim.
Split into simpler sentences: Robert Hansen, a serial killer who resided in the area, admitted in 1984 that he was responsible for the victim's death. He claimed that she was a dancer from a local bar or a prostitute, and that she was his first murder victim.