CAMP PENDLETON, Calif. —  The Marine Corps on Friday dropped charges and gave full immunity to a serviceman who was accused of involuntary manslaughter in a squad's killing of 24 Iraqis in Haditha in 2005.

The case against Lance Cpl. Stephen Tatum, 26, was dropped as jury selection was about to begin for his court-martial.

The government has been seeking Tatum's testimony against the squad leader, Staff Sgt. Frank Wuterich.

In February, Tatum received an order to testify against Wuterich and an unrequested immunity order that said anything to which he testified would not be used against him in his court-martial. On Friday, a new immunity order was issued along with the dismissal of charges.

In addition to two counts of involuntary manslaughter, Tatum had been charged with reckless endangerment and aggravated assault.

Tatum's attorney, Jack Zimmerman, said there was no agreement with the government before the dismissal.

"Absolutely, there is no deal," he said.

Zimmerman said Tatum would testify if called as a witness in future trials but that he would testify as a neutral witness, not a government witness.

The case stemmed from a squad's assault in response to a roadside bombing of a convoy that killed one Marine and wounded two others.

The government says Wuterich and another Marine shot five men at the scene and the squad leader then ordered his men to clear homes with grenades and gunfire, killing unarmed civilians.

Wuterich faces nine counts of voluntary manslaughter, aggravated assault, reckless endangerment and obstruction of justice.