A Kane'ohe Bay Marine pleaded no contest yesterday to identity theft, forgery and theft after he stole the identities of five of his fellow Marines while they were deployed to Iraq.

Marine Cpl. Daniel M. Alfieri, 28, has served two tours in Iraq and knew all of the Marines who became his victims, police have said.

Deputy city prosecutor Chris Van Marter said Alfieri committed the "ultimate act of betrayal" against his comrades. "It's very despicable," he said.

Alfieri and his attorney declined comment yesterday.

Alfieri pleaded no contest to 22 counts, including 14 counts of third-degree identity theft. All of the charges against him are Class C felonies.

Sentencing for Alfieri is set for July 18. He faces up to 10 years behind bars. And Van Marter said yesterday he will ask that Alfieri get some prison time and pay restitution to his victims. "The scope of his crime calls out for prison," Van Marter said.

Police have said Alfieri stole more than $1,000 in cash and goods before military investigators were alerted to his activities. He is accused of applying for more than a dozen credit cards under the victims' names, police have said.

In court yesterday, Van Marter said Alfieri used the credit cards at restaurants, the base exchange and the supermarket. He was unsuccessful in an attempt to withdraw money from an ATM using a credit card.

Van Marter declined to release details on how Alfieri accessed the personal information of his fellow Marines, but police reports indicate he stole some of the Marines' mail while he knew they were deployed. He also used a computer on base to access information.

Police said the thefts happened in late summer 2007.

Van Marter said some of his victims are still serving in Iraq.

On top of the stress of deployment, he said, the victims have been scrambling to contact credit agencies, file police reports and revive their credit. "It caused a lot of stress to them," Van Marter said.

Some of the credit cards were obtained over the phone, while others were applied for over the Internet. The victims include one lieutenant, two sergeants and two corporals, police have said.

Alfieri was taken into custody Nov. 19. He is still in the Marines, pending the result of the case.

But he is now not allowed off base, unless his leave is approved.

During proceedings yesterday, Alfieri said he is suffering from post-traumatic stress disorder and bipolar disorder, and is taking medications for both.

Once the trial is completed, the Marines have reserved the right to prosecute Alfieri for the crimes and potentially others, Van Marter said.