A jury in Waukesha County has found 44-year-old Martha Brown guilty of killing 77-year-old Richard Platt in New Berlin.
Authorities say Brown was discovered partially clothed and wearing a shower curtain at the scene.
She claimed the killing was in self-defense, alleging that Platt had sexually assaulted her and a man with autism.
Investigators reported that Brown confessed to attacking Platt with a ceramic statue and delivering multiple blows.
Her sentencing is set for November.
