Man accused of killing wife and disposing of her body after hiring PI to follow her

Brian Walshe allegedly killed his wife Ana Walshe and discarded her body, which has not been found.
Investigators found a hacksaw with a small bone fragment and other evidence in a dumpster across the street from Brian's mother's home.
Brian and his mother hired a private investigator to tail Ana around her job in Washington, D.C., because he believed she was cheating on him.
Brian pleaded not guilty to several charges, including murder, and was ordered to be held without bail.
Prosecutors allege that Walshe killed his wife after discovering that she was having an affair, which he learned from a private investigator who was hired to follow her.