The US army grounded drones from DJI, the world's dominant drone maker, in 2017 due to security concerns. Police trialled drones before looking into security concerns swirling in the US about data from the flying machines being hijacked or hacked. Police said they did do due diligence on DJI drones - but did not address RNZ's question of if they got this wrong. In the 2019 trial, police districts were given the go-ahead to buy drones from any manufacturer they liked. So police approved only four types of DJI drones for wider use.

Source: Stuff March 23, 2021 21:00 UTC