"He has been stood down from duties pending the outcome of the criminal matters and an employment investigation," said Inspector Mike Johnson, operations manager for the Police Prosecution Service.
Thomson's arrest follows a number of other cases where police have faced drug-related charges.
In May this year Auckland prosecutor Tim Sarah was sentenced to four years' jail after pleading guilty to five charges, including supplying methamphetamine and dishonestly accessing the police intelligence computer system to get confidential information.
Sarah, 37, sold methamphetamine during his lunch break and passed secret information from police files to his drug dealer.
In May 36-year-old Henderson cop Peter Pakau was arrested on 27 counts relating to methamphetamine and accessing the police computer system to supplying information to gang members.
Last month Pakau's colleague Lotovale Perese, who worked as police prisoner escort at the Waitakere District Court, pleaded guilty to smuggling pre-ordered cannabis, letters, lighters, tattoo ink, USB sticks, a cellphone, a watch and various other contraband to 16 prisoners over a six-month period. The 42-year old will be sentenced in December.
Earlier this year former Whangarei Detective Sergeant Michael David Blowers was charged with supplying methamphetamine and selling cannabis while in charge of the organised crime unit in Northland.
