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Law enforcement officials in bomb squad protective gear are driven to the scene of a shooting and the bunker as the standoff with the shooter continues in Midland City, Alabama January 30, 2013. A standoff continued on Wednesday with a gunman who boarded an Alabama school bus and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, authorities said. REUTERS/Phil Sears

Law officers stand beside the Alabama State trooper mobile command post at the Dale County hostage scene in Midland City, Ala. on Thursday, Jan. 31, 2013. A gunman holed up in a bunker with a 6-year-old hostage has kept law officers at bay since the standoff began when he killed a school bus driver and dragged the boy away, authorities said. (AP Photo/Montgomery Advertiser, Mickey Welsh)

Alabama State Trooper Charles Dysert speaks to the media near the scene of a shooting and hostage taking in Midland City, Alabama, January 30, 2013. A gunman boarded an Alabama school bus ferrying children home from school on Tuesday and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, Alabama media reported. Sheriff's officials confirmed that one person had been killed in a shooting involving a school bus in Alabama's Dale County but gave scant details other than to say that a child was present at the scene in Midland City. REUTERS/Phil Sears

Police SWAT teams and hostage negotiators are gathered at standoff and hostage scene in Dale County near Ozark, Ala. on Wednesday Jan. 30, 2013. Authorities were locked in a standoff Wednesday with a gunman authorities say on Tuesday intercepted a school bus, killed the driver, snatched a 6-year-old boy and retreated into a bunker at his home in Alabama. (AP Photo/Montgomery Advertiser, Mickey Welsh)

Ronda Wilbur, a neighbor of murder suspect Jimmy Lee Dykes, points as she speaks with the media about encounters she's had with him at the scene of a shooting and hostage taking in Midland City, Alabama, January 31, 2013. A gunman suspected of fatally shooting an Alabama school bus driver before holing up in an underground bunker with a young child is a Vietnam veteran with anti-government views, authorities and an organization that tracks hate groups said. REUTERS/Phil Sears

Law enforcement personnel stand at the perimeter of the scene of a shooting and hostage taking in Midland City, Alabama, January 30, 2013. A gunman boarded an Alabama school bus ferrying children home from school on Tuesday and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, Alabama media reported. Sheriff's officials confirmed that one person had been killed in a shooting involving a school bus in Alabama's Dale County but gave scant details other than to say that a child was present at the scene in Midland City. REUTERS/Phil Sears

Law enforcement personnel walk away from the perimeter of the scene of a shooting and hostage taking in Midland City, Alabama, January 30, 2013. A gunman boarded an Alabama school bus ferrying children home from school on Tuesday and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, Alabama media reported. Sheriff's officials confirmed that one person had been killed in a shooting involving a school bus in Alabama's Dale County but gave scant details other than to say that a child was present at the scene in Midland City. REUTERS/Phil Sears

As bomb squad personnel (in back) prepare to enter the scene, law enforcement officials turn back a vehicle at a roadblock near a standoff with the shooter in Midland City, Alabama January 30, 2013. A standoff continued on Wednesday with a gunman who boarded an Alabama school bus and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, authorities said. REUTERS/Phil Sears

Law enforcement officials work the scene of a shooting and hostage taking in Midland City, Alabama, January 31, 2013. A gunman suspected of fatally shooting an Alabama school bus driver before holing up in an underground bunker with a young child is a Vietnam veteran with anti-government views, authorities and an organization that tracks hate groups said. REUTERS/Phil Sears

Dale County Sheriff Dale Olson and Alabama State Trooper Charles Dysert (R) speak to the media near the scene of a shooting and a standoff in Midland City, Alabama January 30, 2013. A standoff continued on Wednesday with a gunman who boarded an Alabama school bus and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, authorities said. REUTERS/Phil Sears

An FBI official stands at a roadblock near Destiny Church, the scene of a shooting and hostage taking, in Midland City, Alabama, January 30, 2013. A gunman boarded an Alabama school bus ferrying children home from school on Tuesday and fatally shot the driver before fleeing with a young child and holing up in an underground bunker, Alabama media reported. Sheriff's officials confirmed that one person had been killed in a shooting involving a school bus in Alabama's Dale County but gave scant details other than to say that a child was present at the scene in Midland City. REUTERS/Phil Sears

Murdered bus driver Charles Poland is seen in this undated handout photo courtesy of the Poland family and the Dale County Board of Education. Poland died January 29 in a shooting and hostage taking in Midland City, Alabama. The standoff stretched into a third day on Thursday with an Alabama man accused of fatally shooting a school bus driver and then taking a young boy hostage in an underground bunker equipped with electricity and food. REUTERS/Poland Family Handout

In this Wednesday, Jan 30, 2013 photo, media outlets those from around the state of Alabama broadcast while covering the ongoing hostage crisis, in Midland City Ala. Police, SWAT teams and negotiators were at a rural property where a man was believed to be holed up in a homemade bunker Wednesday after fatally shooting the driver of a school bus and fleeing with a 6-year-old child passenger, authorities said. (AP Photo/Dothan Eagle, Jay Hare)