Oddly Horrifying on Instagram: "José Manuel Martínez, known as El Mano Negra (’’The Black Hand”), was a cartel hitman who shocked the U.S. when he confessed to carrying out dozens of murders over three decades. Despite living a quiet life in California as a family man, he secretly worked as a contract k*ller, often describing his crimes in chilling detail during interviews. In one story, he even claimed he k*lled a man simply for parking in his driveway — a glimpse into how casually he viewed vi