Matthew Perry’s murder has prompted numerous government agencies to step up their attempts to discover the individual who provided the actor the ketamine that killed him. According to TMZ, the DEA is now working with the United States Postal Inspection Service to do so.

According to law enforcement officials, federal investigators from the United States Postal Service are now involved in the investigation and are looking into whether Matthew obtained any drugs via mail. We’ve been told that postal inspectors are giving their knowledge, including the capacity to track parcels and other mail-related investigation tools.

TMZ broke the story… local police and the DEA have been looking into the circumstances of MP’s death for months, after a toxicology check revealed the actor died from acute ketamine effects.

READ MORE: Crypto Scammers Hack Matthew Perry’s X Account… Solicit Donations, Too.

Though the report stated that Matthew had been receiving ketamine infusion therapy for mental health issues for more than a week before his death, the medical examiner determined that the ketamine in his system at the time of death was not from the treatment, raising the possibility that he obtained it from another, non-medical source.

READ MORE: Matthew Perry Allegedly Lied About Sobriety And Beat His Best Friend When Confronted With It

Many of Matthew’s close Hollywood acquaintances have stated that the actor was in a really good place before his sad death, with many believing he was sober and planning to launch a foundation to help others with addiction issues.

Matthew was discovered lifeless in the hot tub of his Pacific Palisades home in October; his assistant contacted 911, but first responders were unable to revive him. He was pronounced deceased at the spot.

He was laid to rest one week later.