Walker, 20, of 92 Pine Hill Drive in Carrboro died Sept. 7 at his residence. One of Walker's roommates found his body around 10:30 a.m. Officials said there was no evidence of foul play.
Wednesday, the Carrboro Police Department released information regarding Walker's death obtained from the Orange County Medical Examiner's Toxicology Lab.
The toxicology reports state that there was a significant level of cocaine in Walker's system, suggesting recent cocaine use. There also was an elevated level of oxycodone -- the main ingredient in OxyContin -- detected in his system, according to reports. The police press release also states that Walker's blood alcohol level was .10 at the time of his death.
Although some information about Walker's death has been released, the medical examiner's report is not complete and his cause of death is still unknown.
It is still unclear what killed Walker, but examiners have reported that oxycodone -- a strong narcotic pain reliever that has been linked to more than 120 deaths nationwide -- was found in his system.