>> reporter: 76-year-old john kapoor is the founder of insys therapeutics, which prosecutors said aggressively marketed subsys, a potent opioid painkiller which was f.d.a. approved only for breakthrough cancer pain. according to the f.d.a., more than 8,000 people died from the drug, including 32-year-old sarah fuller, says her mother, deb fuller. >> they all got away with murder. that's exactly what they did. because it's more than sarah that died from this. >> reporter: last year, kapoor and five other former insys therapeutics executives were found guilty of a nationwide conspiracy to boost sales. it was the first successful criminal prosecution, holding pharmaceutical executives accountable for the opioid crisis ♪ insys therapeutics that is our name ♪ >> reporter: prosecutors presented this rap video during the 10-week trial as evidence. employees of the company were featured in the video ♪ i got new patients and a got a lot of them ♪ >> reporter: prosecutors say insys bribed doctors by paying