A convicted steroid dealer who provided evidence and testimony to the NFL last month that tied several players to the use of performance-enhancing drugs was found shot to death Thursday morning at his home, according to The New York Times. David Jacobs, who pleaded guilty to federal steroid distribution charges last year, began cooperating with the NFL after he was sentenced to probation in May. He was found dead at his home (Plano, TX) with his girlfriend, who had also been shot. ?It?s a homicide investigation for now,? Gerry Minton, a Plano police department spokesman, said in a telephone interview. ?We will treat it as such until evidence leads us elsewhere.?