ORLANDO, Fla. -

Thirteen people were charged Wednesday for their roles in the hazing death of Florida A&M university drum major who was severely beaten during a ritual, something the district attorney called "an American tragedy."

The charges were announced more than five months after 26-year-old Robert Champion died aboard a chartered bus parked outside an Orlando hotel following a performance against a rival school. The case has exposed a harsh tradition among marching bands at some colleges around the U.S. and brought more scrutiny to them.

Leon County Sheriff's Office spokesman James McQuaig said 23-year-old Caleb Jackson and 24-year-old Rikki Wills were booked into the Leon County Jail at 4 p.m. Wednesday for their roles in Champion's death.

Champion was severely beaten by band members in November and had bruises on his chest, arms, shoulder and back, authorities said. Witnesses told emergency dispatchers Champion was vomiting before he was found unresponsive aboard the bus.

State Attorney Lawson Lamar said 11 of the 13 people will face a hazing resulting death charge, a third-degree felony. If convicted, they could face up to nearly six years in prison. The other two people will face a misdemeanor charges.

Lamar called Champion's death "homicide by hazing."

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The names of those charged will not be released until they are all arrested, Lamar said. It was also not immediately clear whether they were all band members.

Legal experts had predicted prosecutors may file more serious charges like manslaughter and second-degree murder. The Champion family attorney, Christopher Chestnut, said they were disappointed.

"They had hoped for more serious charges. They were hoping for a stronger message. He was beaten to death," he said.

Prosecutors, however, didn't think they had enough evidence.

"The testimony obtained to date does not support a charge of murder, in that it does not contain the elements of murder," Lamar said. "We can prove participation in hazing and a death. We do not have a blow or a shot or a knife thrust that killed Mr. Champion. It is an aggregation of things which exactly fit the Florida statute as written by the Legislature."

Florida's hazing law was passed in 2005 following the death of University of Miami student Chad Meredith four years earlier. Meredith was drunk and died trying to swim across a lake at the behest of fraternity brothers. No criminal charges were filed in his case, but a civil jury ordered the fraternity Kappa Sigma to pay Meredith's parents $12 million.

Champion's death has jeopardized the future of FAMU's legendary marching band, which has performed at the Grammys, presidential inaugurations, Super Bowls and even represented the U.S. in Paris at the 200th anniversary of the French Revolution.

Hazing has long been a problem in marching bands, particularly at historically black colleges in the South, where a spot in the band is coveted and revered as much as the sports teams.

On HBCU campuses, band members are often given perks and treated like celebrities. Band nicknames are almost as well-known as the school mascot: The Human Jukebox, The Sonic Boom of the South, and in Florida A&M's case, The Marching 100.

Much of the hazing reported at Florida A&M has involved students trying to get into certain groups within the band. Those who don't make a group were often ostracized.

Champion's parents have sued the bus company owner, claiming in a lawsuit that the bus driver stood guard outside the bus while the hazing took place. The bus company owner initially said the bus driver was helping other band members with their equipment when the hazing took place.

Witnesses in the Champion case have told his parents he might have been targeted because he opposed the hazing, the parents' attorney has said. It has also been suggested to them that Champion was targeted because he was gay and a candidate for chief drum major.

The lawsuit described two types of hazing that took place on the bus. During the first, pledges of a band clique known as "Bus C" ran from the front to the back of the bus while other band members slapped, kicked and hit them. A pledge who fell was stomped and dragged to the front of the bus to run again.