The latest update in Susan Spencer and 48 HOURS' investigation into the 2011 death of Uta von Schwedler, who was found in her bathtub by her then-boyfriend. It took six weeks for the autopsy report to be released, which listed the cause of death as drowning. The manner of her death was listed as "undetermined," leaving open the possibility of suicide. Evidence at the scene even suggested von Schwedler might have killed herself. But her son, Pelle Wall, was convinced his father Johnny Wall killed her and vowed to do whatever he could to get his father convicted. Johnny Wall maintained he had nothing to do with his ex-wife's death. He was arrested and charged in 2013 with killing his wife. He went on trial in February 2015. Saturday's broadcast of "Father and Son" has the latest twist in a case that 48 HOURS has been covering for four years.