Sayoc, a registered Republican with a criminal history, now faces up to 48 years in prison, although further charges are expected to be filed against him for the mail-bombing campaign, which heightened political tensions and put the country on edge.
This frame grab from video provided by WPLG-TV shows Federal Bureau of Investigation agents escorting Cesar Sayoc, in sleeveless shirt, in Miramar, Fla., on Friday, Oct. 26, 2018. He has previously worked as an amateur body builder and male stripper.
President Donald Trump on Sunday lashed out at billionaire Democratic activist Tom Steyer, ridiculing him as a "stumbling lunatic" days after Steyer was targeted by one of more than a dozen pipe bombs sent to prominent critics of the president.
Two more suspicious packages surfaced Friday morning, one in Florida addressed to Sen.
But federal authorities say the bombs Sayoc allegedly sent were real and a danger to their recipients. The homemade bombs "are not hoax devices", Wray stressed on Friday.
That same day, Sayoc, still under the radar of law enforcement, retweeted a post saying, "The world is waking up to the horrors of George Soros".
The bubble-wrapped manila envelopes, addressed to Democrats such as Barack Obama and Hillary Clinton and intercepted from DE to California, held vital forensic evidence that investigators say they leveraged to arrest Sayoc four days after the investigation started.
FBI Director Christopher Wray, left, smiles with Attorney General Jeff Sessions before a news conference about the arrest of Cesar Sayoc, 56, in the package bomb case, at the Department of Justice, Oct. 26, 2018, in Washington.
Sayoc, who seemed to be living out of a van in Aventura, Florida, was taken into custody on a day when four more explosive packages were found, including two intended for U.S. senators, both Democrats.
One law enforcement official said the fingerprint discovery was a major breakthrough. 27, published a news article headlined "How the package-bomb suspect found inspiration in Trump".
As the Federal Bureau of Investigation worked around the clock, and as Americans were busy debating the hard-edged political climate and whether Trump had fanned the flames with his rhetoric, it was business as usual for Sayoc as he took to Twitter to denigrate targets like Soros.
On both the packages and the social media posts, her name was spelled "Shultz", according to the complaint. My feeling was, after one month in office, we didn't need to hear anything more from Trump's mouth - we already knew everything we needed to know about him.
"He's done everything from trying to operate a laundromat, to being a DJ, a bouncer, a dancer, a pizza man, you name it", said Ron Lowy, an attorney representing Sayoc's family.
"And they do have a major role to play as far as tone", Trump said.