Often engineers and lawyers cannot communicate, in spite of repeated attempts. The lawyer has an idea and wants the engineer to prove it in front of a jury. As examples: a quiet, or briefly loud source must be shown to cause hearing damage, or a construction project in a backyard must be shown to be nonannoying. Often it is a no brainer, either way. But the testimony must be given! In this paper, I discuss a sad case. A young woman and her baby daughter were murdered. A witness claimed she heard something in the dead of night. If so, it was further evidence of guilt of the accused. If not, it was evidence of the lack of credibility of the witness and helped show innocence. I present the results of a forensic investigation of a very brutal murder based on acoustics of the victims' screams, the structure housing the murder, and the witness. The results of the investigation attempted to help the case.