“Based on information [police] were told and evidence that was found, they had evidence of a possible drug overdose," Sgt. Pete Dugan tells PEOPLE

By Brianne Tracy
November 16, 2017 06:30 PM

Rising rapper and YouTube star Lil Peep might have overdosed on Xanax when he was pronounced dead at 8:53 p.m. on his tour bus Wednesday, Tucson Police Department Sgt. Pete Dugan tells PEOPLE.

“Based on information [police] were told and evidence that was found in the tour bus, they had evidence of a possible drug overdose, most likely from Xanax,” Sgt. Dugan says, adding that an official cause of death will be released by the medical examiner after toxicology reports. “Based on evidence, there was drug paraphernalia found inside the bus and some narcotics.”

According to Sgt. Dugan, Lil Peep (real name Gustav Åhr) was scheduled to perform at The Rock nightclub in Tucson on Wednesday when the people who were with him on tour hadn’t seen him in a while. After finding Lil Peep unresponsive inside of his tour bus, his manager called 911 sometime before 9 p.m. Both Tucson Police Officers and Tucson firefighters responded. Tucson Fire tried to revive him but were unsuccessful and he was pronounced dead on the scene.

Credit: Swan Gallet/WWD/REX/Shutterstock

Sgt. Dugan adds that the Tucson Police Department’s aggravated assault detectives later arrived on the scene to continue the investigation. “If it was an 80-year-old person, we probably wouldn’t have called our aggravated assault [detectives] but a 21 year old should not just drop dead for no reason,” Dugan says.

Sgt. Dugan says the evidence of a possible drug overdose was later found on the tour bus.

Sarah Stennett, the CEO of First Access Entertainment — which partnered with Lil Peep last year — confirmed his death in a statement to PEOPLE on Thursday, “I am shocked and heartbroken. I do not believe Peep wanted to die, this is so tragic. He had huge ambition and his career was flourishing […] I have spoken to his mother and she asked me to convey that she is very, very proud of him and everything he was able to achieve in his short life.”

Lil Peep openly spoke about his drug use in his lyrics on songs from his debut album, Come Over When You’re Sober, released on Sept. 1.

“I suffer from depression and some days I wake up and I’m like, ‘F—, I wish I didn’t wake up,’” he told Pitchfork in an interview published in January. “I don’t express that side of myself on social media. That’s the side of myself that I express through music. That’s my channel for letting all that s— out.”