Sixteen members of a breakaway Amish community in rural eastern Ohio, including its leader, were convicted of federal hate crimes Thursday for the forcible cutting of Amish men's beards and Amish women's hair.

Sam Mullet Sr. and the 15 followers were found guilty of conspiracy to violate federal hate-crime law in connection with what authorities said were the religiously motivated attacks on several fellow Amish people last year.

The verdicts were read in U.S. District Court in Cleveland following several days of jury deliberation and a trial that began in late August, a U.S. attorney's office said.

Prosecutors said the 15 followers, at Mullet's instruction, shaved the beards and cut the hair of Amish people who had left his group over various religious disagreements. Five attacks happened in four Ohio counties between September and November 2011, authorities said.

To the Amish, a beard is a significant symbol of faith and manhood, and the way Amish women wear their hair also is a symbol of faith, authorities said.

The assaults violated the Matthew Shepard-James Byrd Hate Crimes Prevention Act, which "prohibits any person from willfully causing bodily injury to any person, or attempting to do so by use of a dangerous weapon, because of the actual or perceived religion of that person," according to the office of the U.S. attorney for the Northern District of Ohio.

November 1, 2011: CNN goes inside Mullet's compound

August 27, 2012: Hate crimes trial against Amish begins

While the charges can carry a sentence of up to life in prison, the judge can choose any length, and the federal guidelines in this case is probably about 17.5 years, said Mike Tobin, spokesman for the U.S. attorney's office.

Mullet, a bishop of a group living on a compound outside Bergholz in eastern Ohio, wanted to "seek revenge and punish the departing families," according to an FBI affidavit filed before the trial. The attackers, using scissors and battery-powered clippers, injured their victims as well as others who tried to stop the attacks, prosecutors said.

“(The attackers) sheared them almost like animals, leaving them bloodied, bruised and beaten," U.S. Attorney Steven Dettelbach told reporters Thursday. "These were no mere haircuts. These were violent attacks ... (leaving victims) so shaken and scared that they felt compelled to call on local law enforcement.”

Usually, the Amish resolve disputes without involving law enforcement, but some Amish members reported the beard-cutting incidents to police last fall.

Mullet’s group, which had broken away from a larger Amish community, is made up primarily of his relatives living on and around an 800-acre compound in a remote valley outside Bergholz.

The jury also convicted various groupings of defendants with separate assaults, and Mullet and Lester Mullet with concealing or attempting to conceal items of evidence, including a camera and pictures of the attacks, the U.S. attorney's office said.

The 16 defendants were:  Samuel Mullet Sr., 66; Johnny S. Mullet, 39; Daniel S. Mullet, 38; Levi F. Miller, 54; Eli M. Miller, 32; Emanuel Shrock; Lester Miller, 37; Raymond Miller, 27; Freeman Burkholder, 31; Anna Miller; Linda Shrock; Lester Mullet; Elizabeth A. Miller; Emma J. Miller; Kathryn Miller; and Lovina Miller, 32.

All live in Bergholz, except for Raymond Miller, Burkholder, Elizabeth Miller and Kathryn Miller, who are of Irondale, Ohio; and Lester Mullet, who is of Hammondsville, Ohio.

- CNN's Jason Hanna, Mallory Simon,Tricia Escobedo, Chuck Johnston, Alan Duke and Chris Welch contributed to this report.