Conspiracy of Silence: A Joe Scintilla Mystery

When the lovely Lizbeth Crawford walks into Scintilla's office, she tells him that her father, wealthy industrialist James Crawford, did not kill his brother Frank, even though he confessed and is now serving a prison sentence. Is Crawford shielding someone? Why are both his mother and wife happy to have him imprisoned? And why did Frank's fiancée commit suicide shortly after his death?