Alleged "Thrill Kill" Soldier's Hearing Begins

Updated at 6:40 p.m. ET

The Army sergeant accused of masterminding a plan to kill Afghan civilians for sport and goading other soldiers to do the same appeared at a military hearing Tuesday to determine whether there is enough evidence to court-martial him.

In what has emerged as one of the most gruesome cases of the Afghan war, fellow soldiers say Staff Sgt. Calvin Gibbs also threatened them, collected fingers of the dead and found it amusing to slaughter animals with his assault rifle.

CBS News National Security Correspondent David Martin reports that Specialist Jeremy Morlock, who is accused of taking part in three murders earlier this year, told Army investigators, "He's crazy, Gibbs is. There's something wrong with that guy. I've seen him kill. I know he's killed dudes."

Martin reports there are pictures of soldiers posing with the bodies of their victims and the Army is doing everything it can to keep those photos from becoming public.

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Gibbs has a chance to contest that portrait during the Article 32 hearing at Joint Base Lewis-McChord south of Seattle. Charges against him include murder, dereliction of duty and trying to impede an investigation.

The hearing is similar to a civilian grand jury proceeding, with an officer determining if there is enough evidence to send the case to a court martial. It is expected to last two days, with a decision in the coming weeks.

Presiding officer Col. Thomas Molloy said Tuesday that attorneys for 10 of the other 11 soldiers charged - some with killings, others with other offenses - say they are unavailable to testify. The 11th has not been called.

Gibbs, a 25-year-old from Billings, Mont., is the highest-ranking of the five soldiers charged in the murders of three civilians during patrols in Kandahar Province this year.

"He liked to kill," said Spc. Adam Winfield, who said he tried to blow the whistle on the alleged murder plot before taking part in the final killing. "He manipulated a lot of us into doing what he wanted us to do."

Gibbs insists the deaths were appropriate engagements, said his lawyer, Phillip Stackhouse, who declined to comment further.

Gibbs arrived in the platoon late last year and soon began telling his subordinates how easy it would be to kill civilians, some soldiers said in statements to investigators.

He reportedly spoke of getting away with killing a family when he served in Iraq - a claim investigators are still looking into.

The soldiers said he devised scenarios under which he could kill Afghan civilians, suggesting in one case that if he and his men came across someone in a village flagged as Taliban-influenced, they could toss a grenade and claim they had been responding to a threat.

Gibbs also illicitly collected weapons - including an AK-47 and a rocket-propelled grenade - which he could plant on the bodies of dead civilians to make them appear to be combatants, the soldiers said.

In addition to the killings, Gibbs and some of his men fired at - but missed - two unarmed farmers during a patrol in late March, investigators were told.

Gibbs falsely reported that they shot at three combatants, one armed with a rocket launcher, according to Staff Sgt. Robert G. Stevens, of Portland, Ore., who said he took part in the attack but tried to miss the farmers. The three were not killed or wounded, Stevens said in a sworn statement.

Stevens, Gibbs and four other soldiers are charged with conspiring to commit aggravated assault in that incident.

The probe of the killings started after a witness in a drug investigation, Pvt. 1st Class Justin Stoner, reported being badly beaten by a group of soldiers led by Gibbs.

Stoner said Gibbs and the other central figure in the case, Spc. Jeremy Morlock, of Wasilla, Alaska, later returned to his room, where Gibbs laid a set of severed fingers on the floor as Morlock warned him not to rat.

"I believe he has no regard for any life in general," Stoner said of Gibbs. "I have watched him slaughter animals with his M-4 and finding it amusing is just completely wrong."

After the beating, Stoner told investigators he believed Morlock had three unjustified kills.

The first was in January. Morlock told investigators that it happened a few weeks after Gibbs gave him an illicit grenade and told him he should carry out the scenario they had discussed.

Morlock said he tossed the grenade at a man in a field as another soldier, Pvt. 1st Class Andrew Holmes, of Boise, Idaho, shot; Holmes says he had no knowledge of any plot to kill civilians.

Winfield sent messages to his parents in Cape Coral, Fla., after that killing, telling them his colleagues had murdered a civilian. They were urging him to get one of his own, he said, and he was being threatened to keep quiet.

Winfield's father called Lewis-McChord that day and says he told a sergeant about his son's situation and urged the Army to intervene.

Gibbs is accused of killing a civilian in February, a week after Winfield's father made the calls, and dropping an AK-47 by the victim's body to make it appear he was armed. Spc. Michael Wagnon also is accused of participating in that killing, but denies involvement.

In the third killing, in May, Gibbs is accused of tossing a grenade at a civilian as Morlock and Winfield shot. They told investigators the victim posed no threat; Winfield, who said he felt pressured by Gibbs, called it "the worst thing I've ever done in my life."

Morlock told investigators he was deathly afraid of Gibbs even as he participated in killings. But other soldiers from the platoon said Gibbs was well-liked and that his competence likely saved lives.