Matthew Perry’s drug death is reportedly being probed by authorities including the US postal service. The ‘Friends’ star was found dead aged 54 in the hot tub of his Los Angeles home in October 2023, with an autopsy revealing he had been killed by “acute effects of ketamine”. It was reported on Tuesday (21.05.24) by TMZ his passing is still under investigation as police want to identify the supplier of the drugs that killed the actor. The outlet has now reported the Drug Enforcement Administration is getting assistance from the US Postal Inspection Service in its efforts to find the person who…