Chapter 3 of "The Trials of Marvin Mutch" podcast series covers the prosecution and conviction of Marvin Mutch for the murder of 13-year-old Cassie Riley. Prosecutors were able to obtain a conviction based on a complex chain of circumstantial evidence, which Mutch would later appeal as insufficient to merit a first-degree murder conviction.
The prosecution's key witness against Mutch was his then 16-year-old sister, Valerie, who was housed with a district attorney's investigator for months leading up to the trial and her testimony. It's unclear who involved in Mutch's trial was aware of Valerie's living situation, and when. But the jury never heard about it.
Explore case notes, selected trial transcripts, news reports and photos related to the trial below.
Union City detectives interrogated Mutch for hours the night of his arrest, starting at 1:50 a.m., according to the record of the statement he gave to police.