Cesar Sayoc, 56, from Aventura, Florida, has been charged with five federal crimes after being captured in Miami.
Police linked his fingerprints to the 13 suspicious packages sent to prominent critics of US President Donald Trump.
Records show this is not Sayoc's first run-in with the law, according to reports.
Image:Sayoc shared images of his younger self astride a motorbike. Pic: Cesar Sayoc
Image:Sayoc showed his patriotism in his clothing. Pic: Cesar SayocHe was arrested in 2002 by Miami police for an offence described as a "threat to bomb" and "threaten to discharge a destructive device".
Sayoc was a prolific social media user, holding multiple profiles on the same platforms and using different usernames.
At least one of his Facebook accounts paint a picture of a man who wanted to seen as stereotypically masculine as could be, while his Twitter shows someone who spent hours sharing pro-Republican and anti-Democrat images and messages.
Video:The man suspected of sending 13 pipe bombs in America filmed himself chanting at a Trump rally. Credit: Cesar Sayoc
Image:Here Sayoc holds up a sign saying CNN sucks. One of the pipe bombs was sent to CNN. Pic: Cesar SayocImages on his personal Facebook indicate he spent hours in the gym working out, as well as partying and watching soccer.
Pictures of nearly naked women and men - including a semi-nude black and white image of footballer Cristiano Ronaldo - are dotted throughout.
Photos on his page show him in a small pair of black briefs posing to show off his well-oiled muscles.
These images - which include one of him doing the splits - are mixed in with pictures of Sayoc cuddling up with attractive women in skimpy bikinis.
Image:On his LinkedIn, Sayoc said he worked in the male stripper industry. His van is pictured alongside this advert. Pic: Cesar Sayoc
Image:Sayoc shared a number of photos of himself with attractive women. Pic: Cesar SayocIn a photo posted in April 2015, Sayoc is pictured gurning and sweaty mid-weight lift while wearing trousers made out of the American flag pattern - one leg stars, the other stripes.
Another Americana photo shows him straddling an enormous motorbike, giving the person behind the camera a hearty thumbs up.
It's not all parties and muscles on his Facebook. It also features photos of him in the grounds of a North Carolina university he says he attended.
Image:Cesar Sayoc has been arrested in connection with the suspicious packagesThe university has not responded yet to Sky News' attempt to verify whether he attended there.
His LinkedIn says he is a promoter. booking agent, owner and choreographer of a number of enterprises, including Chippendales male strippers.
Another photo shows a large advert for unofficial 'Real Magic Mike' experiences, complete with images of naked male torsos and flaming guitars, attached to the van US authorities towed away as part of their investigation.
The van today is covered in pro-Trump, anti-Democrat stickers but in the images posted in 2015 the windows are bare.
If his Facebook is his party-persona, his multiple Twitter accounts are his political stomping ground.
Image:Sayoc shared a picture of himself wearing a 'MAGA' hat. Pic: Cesar Sayoc
Image:His Twitter account posted a number of conspiracies about Democrats. Pic: TwitterHis most recent activity was a retweet of his own post of photo-shopped images attacking a Democrat midterm candidate and accusing him of being a George Soros puppet.
One of the 12 suspicious packages were sent to billionaire philanthropist Mr Soros.
Sayoc also posted a number of images urging people to vote Republican, including one which stated "Had Enough? Vote Republican" alongside an image of an American Bald Eagle.
Image:Sayoc uploaded photos from different times of him working out in the gym. Pic: Cesar Sayoc
Image:Sayoc posted regularly on social media. Pic: Cesar SayocInterspersed between repeated posts of images praising Republicans and criticising Democrats, he also wrote threatening messages to American tabloid news site TMZ alongside pictures of the Tarot death card.
"You biggest piece c**p media TMZ , that were complete silent Obama separating kids . Shut your hole TMZ before u end like media slime Saudi Arabia. No one deserves it better than fake fraud Washington Amazon owned post . We Unconquered Seminole Tribe agree," he wrote, in a reference to the death of Saudi journalist Jamal Khashoggi who was a contributor to Washington Post.
In another post, he calls David Hoggs, one of the students who survived the Stoneman Douglas high school shooting in Parkland, Florida, a "fake phony" and accuses him of never attending the school and of being an actor paid by George Soros.
Image:On his LinkedIn, Sayoc says he loves animalsAlthough the Facebook account examined and verified by News shows mostly older photos of Sayoc, other photos allegedly taken from another of Sayoc's Facebook accounts show him attending Donald Trump rallies and wearing a Make America Great Again - known as MAGA - hats.
In a rambling description on his LinkedIn, Sayoc says he initially trained to become "a horse doctor" because he has "a love for animals".
He says he has "respect for all living things".
He continues to make a number of claims about his family history, including that his grandfather was a medical pioneer.
He writes that his family spent time in the Philippines, although some of the stickers on his van suggest he has Native American heritage.
