A defence lawyer for Joaquin “El Chapo” Guzman says the notorious drug lord’s conviction will be appealed, and he plans to “fight to the death” for his client.

Jeffrey Lichtman said outside a Brooklyn court on Tuesday the defence “fought like complete savages” at the US drug-trafficking trial and will “continue to fight” for Guzman.

The Mexican drug lord was convicted of running an industrial-scale smuggling operation after a three-month trial packed with Hollywood-style tales of grisly killings, political payoffs, cocaine hidden in jalapeńo cans, jewel-encrusted guns and a naked escape with his mistress through a tunnel.

“No matter who the defendant is, you still have to fight to the death,” Mr Lichtman said.

He explained his client was a positive thinker who “doesn’t give up.”

Upon hearing the verdict, Guzman was “as cool as a cucumber”, Lichtman added.

“Honest to god, we were more upset than he was,” he said.

Federal court marshals whisked Guzman out of the courtroom immediately after the judge read the guilty verdict.

US lawyer Richard Donoghue says he expects Guzman to get a sentence of life in prison without the possibility of parole.

Guzman’s wife left the courthouse without speaking to reporters.

He was found guilty on all 10 counts meaning that he will spend the rest of his life in prison no matter what the judge decides his sentence should be.

Dressed in a grey suit, Guzman then looked for his ex-beauty queen wife, Emma Coronel Aispuro, in the gallery — who flashed him a supportive thumbs up as her eyes welled with tears.

US District Judge Brian Cogan lauded the jury’s meticulous attention to detail. Mr Cogan said it made him “very proud to be an American.”

Guzman faced a drumbeat of drug-trafficking and conspiracy convictions that could put the 61-year-old escape artist behind bars for decades in a maximum-security US prison selected to thwart another one of the breakouts that embarrassed his native country.

New York jurors whose identities were kept secret reached a verdict after deliberating six days in the expansive case, sorting through what authorities called an “avalanche” of evidence gathered since the late 1980s that Guzman and his murderous Sinaloa drug cartel made billions in profits by smuggling tons of cocaine, heroin, meth and marijuana into the US.

HOW EL CHAPO’S DRUGS REACHED THE STATES
Evidence showed drugs poured into the US through secret tunnels or hidden in tanker trucks, concealed in the undercarriage of passenger cars and packed in rail cars passing through legitimate points of entry - suggesting that a border wall wouldn’t be much of a worry.

The prosecution’s case against Guzman, a roughly 5 foot figure (152cm) whose nickname translates to “Shorty,” included the testimony of several turncoats and other witnesses.

Among them were Guzman’s former Sinaloa lieutenants, a computer encryption expert and a Colombian cocaine supplier who underwent extreme plastic surgery to disguise his appearance.

One Sinaloa insider described Mexican workers getting contact highs while packing cocaine into thousands of jalapeńo cans - shipments that totalled 25 to 30 tonnes of cocaine worth $US500 ($A704.63 million) million each year.

Another testified how Guzman sometimes acted as his own sicario, or hitman, punishing a Sinaloan who dared to work for another cartel by kidnapping him, beating and shooting him and having his men bury the victim while he was still alive, gasping for air.

The defence case lasted just half an hour.

Guzman’s lawyers did not deny his crimes as much as argue he was a fall guy for government witnesses who were more evil than he was.

Mr Lichtman urged the jury in closing arguments not to believe government witnesses who “lie, steal, cheat, deal drugs and kill people.”

Deliberations were complicated by the trial’s vast scope.

Jurors were tasked with making 53 decisions about whether prosecutors have proven different elements of the case.

HOW THE DRUG CARTEL THRIVED
The trial cast a harsh glare on the corruption that allowed the cartel to flourish.

Colombian trafficker Alex Cifuentes caused a stir by testifying that former Mexican President Enrique Pena Nieto took a $US100 million ($A140.92 million) bribe from Guzman.

Mr Pena Nieto denied it, but the allegation fit a theme: politicians, army commanders, police and prosecutors, all on the take.

The tension at times was cut by some of the trial’s sideshows, such as the sight of Guzman and his wife, Emma Coronel Aispuro, showing up in matching burgundy velvet blazers in a gesture of solidarity.

Another day, a Chapo-size actor who played the kingpin in the TV series Narcos: Mexico came to watch, telling reporters that seeing the defendant flash him a smile was “surreal.”

While the trial was dominated by Guzman’s persona as a near-mythical outlaw who carried a diamond-encrusted handgun and stayed one step ahead of the law, the jury never heard from Guzman himself, except when he told the judge he wouldn’t testify.

But his sing-songy voice filled the courtroom, thanks to recordings of intercepted phone calls. “Amigo!” he said to a cartel distributor in Chicago. “Here at your service.”

One of the trial’s most memorable tales came from girlfriend Lucero Guadalupe Sanchez Lopez, who testified she was in bed in a safe house with an on-the-run Guzman in 2014 when Mexican marines started breaking down his door.

She said Guzman led her to a trap door beneath a bathtub that opened up to a tunnel that allowed them to escape.

Asked what he was wearing, she replied: “He was naked. He took off running. He left us behind.”

The defendant had previously escaped from jail by hiding in a laundry bin in 2001.

He then got an escort from crooked police officers into Mexico City before retreating to one of his many mountainside hideaways.

In 2014, he pulled off another jail break, escaping through a mile-long lit tunnel on a motorcycle on rails.

Even when Guzman was recaptured in 2016 before his extradition to the United States, he was plotting another escape, prosecutor Andrea Goldbarg said in closing arguments.

“Why? Because he is guilty and he never wanted to be in a position where he would have to answer for his crimes,” she told the jury. “He wanted to avoid sitting right there. In front of you.”