The plea deal includes imposition of an asset cap and other limitations to its business.
Australian police estimate about 70 percent of the highly-addictive drug on the streets comes from the war-torn country.
Prosecutor says slain teenager was allegedly hired by a 23-year-old prisoner to intimidate a member of a rival gang.
Mark Chavez admits to obtaining ketamine with a fraudulent prescription for Perry, who died aged 54 in October 2023.