Question: The Widower is a British television miniseries that portrays the life and crimes of convicted murderer Malcolm Webster,  an Englishman convicted of the murder of who? 
Sentence (from "Elias Abuelazam"): During the investigation, Michigan media dubbed him "The Genesee County Serial Slasher" (or alternately "The Genesee County Serial Stabber").
Relevant evidence: No