On Nov. 20, 2016, McKane blew away San Antonio Police detective Benjamin Marconi, 50. It was not a shootout. McKane was not in any danger. It was a cold-blooded execution in front of police headquarters. As if it matters, he got married hours after the murder. McKane was apparently pissed that cops hadn’t done more to help him in his custody battle with his ex-wife. Alone among western nations, the United States keeps the death penalty on the books but it is steadily losing steam. In 1998, about 300 people were sentenced to die in the electric chair, hang or be the recipient of a lethal injection.