A 21-year-old Yarra Glen woman was among those charged after Casey Crime Investigation Unit detectives allegedly located drugs, firearms and a stolen car in Hallam on 11 April.
Patrolling officers from the Dandenong Frontline Tactical Unit identified a stolen car displaying false plates outside a Princess Highway motel about 2.45am.
Police seized the car and later executed a search warrant at the motel where a man and woman were arrested about 10am.
Detectives also located what is believed to be methamphetamine, GHB, a quantity of cash and keys to the stolen car.
Upon searching the car, it is alleged two firearms, ammunition and suspected stolen goods were found.
A 21-year-old Yarra Glen woman was charged with two counts of possess drug of dependence.
She was bailed to appear at Dandenong Magistrates’ Court on 6 July.
Police charged a 30-year-old Frankston man with traffick methamphetamine, traffick GHB, theft of motor vehicle, handle stolen goods, possess a controlled weapon, two counts of prohibited person possess firearm, three counts of possess ammunition without a license and commit an indictable offence while on bail.
He was remanded to appear at Melbourne Magistrates’ Court on 12 April.