Bricklayer-carpenter Phillip Harrison told police he was 'worth $12 billion' when they pulled him over in a luxury car, a Brisbane court heard.

A Queensland tradie could not explain to the Brisbane Magistrates Court on Saturday morning how he acquired a A$596 million (NZ$669m) bank account, with another $1.56 billion worth of property.

Phillip Johnathan Harrison, 29, a carpenter-brick layer, of Tewantin in Noosa, was charged with seven offences including possession of various drugs including ice and unlawful use of a motor vehicle.

Police Prosecutor Sergeant Sean Francis said Harrison had a "relatively significant quantity" of methamphetamines and MDMA powder when he was intercepted. Police observed some aberrant behaviour and apparent delusional thoughts.

The court heard that Harrison told police that he was worth $12billion and the government was after him when they caught him driving a luxury sports car that he claimed was "given to him". READ MORE: Police strip millions from career criminals "It's one of the most bizarre cases I have ever come across," duty solicitor Nick Hanly told Magistrate Anthony Gett who was trying to determine whether Harrison needed a mental health assessment or bail. Asking for bail, Hanly suggested that Harrison appeared to have the financial means to substantiate his claims. Hanly said he saw Harrison's bank account details after logging into the Commonwealth Bank website with Harrison's username and password. However, Harrison claimed that various confidentiality obligations prevented him from explaining the origins of his wealth. "Now, given the context of his apparent vast wealth, this doesn't appear so delusional," the duty solicitor said. Harrison had been consuming ice because of personal turmoil over a relationship breakdown with the mother of his two-year-old daughter. "He did not make any attempt to run and he was not trying to hide the drugs or evade police," the solicitor told the court. "My instructions are that the car was given to him." Harrison given bail on the condition that he surrender his passport and the matter was adjourned to April 18.

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