A former Honolulu police major already facing extortion, witness tampering, lying to investigators and drug charges pleaded not guilty Friday in U.S. District Court to an additional charge of lying on his taxes.

A federal grand jury returned a new indictment this week against Carlton S. Nishimura, 56, charging him with filing a false individual income tax return for 2005, in addition to the other charges listed in previous indictments.

The FBI said based on an analysis of Nishimura’s bank records, divorce files, tax returns, records of expenditures and transcripts of FBI interviews with him, an Internal Revenue Service agent determined that Nishimura’s cash expenditures in 2005 exceeded what he reported as taxable and nontaxable income by more than $10,000.

Nishimura reported total income of $79,202, the indictment said.

The FBI said Nishimura received about $6,000 per month in extortion money from the operator of an illegal gambling house on Keeaumoku Street from April 2004 to March 2006 when he was a police captain assigned to the patrol district that includes Keeaumoku Street.

Nishimura retired from HPD at the end of 2011.

He had asked the court to order the government to turn over the data that the IRS agent used to make his determination so that Nishimura’s own expert could evaluate it. U.S. Magistrate Kevin S.C. Chang denied the request in February.