after initially denying he was involved, mark jarman eventually confessed. he was at the same bar as shirley and ed andronowich on the night of the murder, but he didn't speak to them. he said he ran into shirley andronowich later near the high school while she was out walking. jarman said they talked and had consensual sex. jarman said he killed shirley andronowich when she threatened to tell her husband. jarman said he emptied the contents of her purse to make the scene appear to be a robbery. but investigators didn't believe jarman's entire story. staff sergeant dan rahn is a blood spatter expert who studied the crime scene photos and noticed an inconsistency in jarman's story. the distance blood travels from a head wound struck by an object the size and weight of a cement block is 10 to 12 feet. creating medium velocity impact spatter. on the papers found within 10 to 12 feet of shirley andronowich's body, rahn discovered medium velocity impact spatter. >> the pictures of the evidence actually showed that the contents of her purse had been strewn around a