The filmmaker initially pleaded guilty to lying to federal agents in 2006 about the investigation of Pellicano, who was convicted in 2008 of 76 wiretapping counts and sentenced to 15 years in prison.
He then attempted to withdraw the plea, arguing he didn't have adequate legal representation when he confessed to hiring Pellicano to illegally record movie producer Charles Roven's phone conversations.
The case moved forward in July (10), when McTiernan pleaded guilty to two counts of making false statements to the Federal Bureau of Investigation (FBI). He also pleaded guilty to one count of perjury for lying to a federal judge while trying to withdraw a guilty plea.
In a ruling made by U.S. District Judge Dale Fischer on Monday (04Oct10), McTiernan was sentenced to the prison term, and also ordered to pay a $100,000 (GBP66,670) fine and serve three years probation.
McTiernan remains free on bond pending an appeal.