A man accused of murdering two drug dealers, who were forced into a toolbox and dumped in a creek, told police he was grateful to be arrested but wanted his "normal life back".

Cory Breton's and Iuliana Triscaru's decomposing bodies were found in a large metal box at Scrubby Creek, south of Brisbane, on February 11, 2016.

The accused admitted he was at the creek when the toolbox was pushed in the water, the Brisbane court has heard. Credit:Michael Felix/AAP

Tuhirangi-Thomas Tahiata, 28, has pleaded not guilty to murdering the pair after they were lured to a townhouse in Kingston 18 days earlier and assaulted by a group of men.

But in a police interview played at his Brisbane Supreme Court trial on Thursday, Tahiata admitted he was at the creek when the toolbox was pushed into the water by a man named Trent Thrupp.