MIAMI He bowed his head as a federal judge read all 21 guilty verdicts.

Then he shook it from side to side, as if in disbelief.

Damion St. Patrick Baston finally lifted his head as each of the Miami federal jurors was polled Tuesday, confirming verdicts that convicted him of sex trafficking and related crimes. They had deliberated for less than six hours.

The 12-person jury heard a half-dozen women testify about how the Jamaican man beat and raped them as he forced them into his prostitution racket, an operation that ranged from Australia to Dubai to Miami. The defendant took the witness stand for three days and denied everything.

"I am not a pimp," Baston, 37, declared last week.

But the jurors did not believe him, saying afterward that he shouldn't have taken the witness stand. "He didn't do himself any favors," the foreman, who did not want to be identified, told The Miami Herald.

Another juror said the prosecution's evidence was overwhelming. "All of their i's were dotted and t's crossed," he said.

The jury's verdicts, after a two-week trial, could result in a maximum life sentence for the Jamaican national, who was charged last year with sex trafficking, money laundering and other crimes. At the very least, Baston faces a minimum-mandatory sentence of 15 years when he appears before U.S. District Judge Cecilia Altonaga on Sept. 5.

U.S. Attorney Wifredo Ferrer said the investigation, a collaboration of American, Australian and United Arab Emirates law enforcement agencies, led to the first prosecution of this kind in the United States.

"It is the first time we have used the recently enacted extraterritorial jurisdiction provision of our anti-trafficking laws to charge someone for sex trafficking that occurred in another country," Ferrer said after Baston's conviction.

Raised for part of his childhood in New York City, Baston was deported from the United States in the late 1990s for having a prior criminal conviction. Two years ago, he arrived in Miami with an Australian woman and an American woman, and used "psychological coercion and physical abuse" against them to pick up men at South Florida strip clubs and turn tricks, according to prosecutors.

At trial, prosecutors unveiled documents showing that Baston stole the identity of an American man that allowed him to travel to Australia, the United Arab Emirates and the United States to orchestrate his prostitution ring and earn hundreds of thousands of dollars.

"He converted them into little more than sex slaves," Assistant U.S. Attorney Roy Altman told jurors during closing arguments on Friday, calling Baston a "kind of monster" who bragged about being a member of the L.A. street gang, the Bloods, to frighten the women.

"He was very much a pimp in every sense of the word," Altman argued, accusing Baston of lying repeatedly on the witness stand.

But Baston's defense attorney, David Rowe, argued that he did nothing wrong in Australia, where prostitution is legal, before coming to Miami in 2012 with an Aussie woman and an American women who had worked in his Bachelors Club escort business overseas. Rowe said his client told the truth, and never coerced or abused any of the women for personal profit.

"These girls were free to go," Rowe said, calling the prosecution's case "much ado about nothing."

He said that one Aussie woman, with whom Baston had started the escort business in Australia, expressed her love for him, citing proof in emails, videos and her own words on the witness stand.

"There was never any evidence or indication that she wanted to run away from him," Rowe argued during closing arguments. "If anything, she did not want to be away from Mr. Baston."

But prosecutor Olivia Choe pointed out that six women from Australia, New Zealand and the United States testified at trial and each one revealed how they fell for Baston, a former weightlifter and black belt in karate only to discover that he would punch or strangle them, sometimes threatening them with a knife or broomstick. They all called him "Drac," short for Dracula, or "Daddy."