Sources connected to the investigation told TMZ the track marks were "obvious." The singer had a history of using drugs. The toxicology tests will reveal what drugs were found in Chris' system.
The new information is consistent with TMZ's story that Ted Keedick, Chris' longtime house engineer and tour manager, said Chris seemed "high" and "f***ed up" during the concert hours before his death.
Chris' wife has said her husband had told her he took "an extra Ativan or two."