Xfinity Series crew chief Nick Harrison had cocaine, opioids and alcohol in his system when he died on July 21, Fox Sports reported on Wednesday.
Fox Sports cited the North Carolina medical examiner's office as the source of the information. The toxicology report said the death was accidental.
According to Fox Sports, the toxicology report shows the 37-year-old Harrison had 0.14 milligrams of cocaine, 0.32 milligrams of oxycodone and a blood-alcohol level of 0.08 in his system.
Harrison was found dead the morning after Saturday's Xfinity Series race at New Hampshire Motor Speedway at Loudon, N.H. He reportedly arrived in North Carolina late Saturday night.
Harrison was part of racing teams since 2006. According to NASCAR.com, he was the lead chief for 120 NASCAR Cup Series races from 2010-14 and 184 Xfinity races.
NASCAR said Harrison had five career victories -- including a NASCAR win with Kurt Busch. He won four Xfinity races -- three with Austin Dillon and one with Paul Menard.
Harrison was in his first season with Kaulig Racing and was serving as the crew chief for Justin Haley.
--Field Level Media