Murder-accused Wayne Bracken frequently referred to himself as "the Devil" and called himself "Bracano", saying he was protected by the Italian mafia.
The evidence came from his half-brother Kenneth Bracken under cross-examination by defence lawyer Michael Dodds as the murder trial entered its third week in the High Court at Whangarei yesterday.
The Crown says Jack Davis, 30, a father from Auckland, was killed with a thistle grubber. His body was found near the remote Wairakau bush track on the northern side of the Whangaroa Harbour on February 25, 2011.
Wayne Bracken, 35, and Neville Joseph Dangen, 24, are on trial for the murder and kidnapping of Mr Davis.
In court Kenneth Bracken told of how his older brother was a frequent methamphetamine user and how he had been supplying him with the Class A drug last February - even though Wayne was growing increasingly paranoid.