Matthew Perry, Ketamine, and Me Rolling StoneDoctor charged in Matthew Perry death was interviewed by the DEA days before actor died CBS Los AngelesHow one doctor’s cooperation could affect the case against the other in Matthew Perry’s death MSNBCVideo Doctor in court for Matthew Perry case, Girardi guilty, Diddy lawsuit continues ABC NewsHas ketamine’s time of reckoning arrived? 5 things to know after Matthew Perry’s death CNN