A single fingerprint and several misspelled words were among some of the clues that pointed the FBI to a Florida man who was charged Friday with mailing homemade bombs to prominent Democrats, The Washington Post reported.

Cesar Sayoc Jr., a supporter of President TrumpDonald TrumpPoll: 73 percent of Democratic voters would consider voting for Biden in the 2024 primary Biden flexes presidential muscle on campaign trail with Virginia's McAuliffe Has Trump beaten the system? MOREwas arrested Friday in connection with a series of 13 suspicious packages and pipe bombs that were sent to high-profile Democrats including former President Obama, former Secretary of State Hillary ClintonHillary Diane Rodham ClintonBiden flexes presidential muscle on campaign trail with Virginia's McAuliffe Shontel Brown gaining ground against Nina Turner in Ohio: poll Biden hits trail for McAuliffe in test of his political brand MORE and former Vice President Joe BidenJoe BidenBiden authorizes up to 0M for Afghan refugees Poll: 73 percent of Democratic voters would consider voting for Biden in the 2024 primary Biden flexes presidential muscle on campaign trail with Virginia's McAuliffe MORE, among others.

FBI Director Christopher Wray said at a press conference following Sayoc's arrest that investigators were able to find a fingerprint on the envelope of a bomb sent to Rep. Maxine WatersMaxine Moore WatersBipartisan bill will help level the playing field for small businesses Republicans hammer HUD chief over sluggish rental aid Key GOP lawmaker backs Powell for another term as Fed chief MORE (D-Calif.).

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The fingerprint marked a breakthrough for investigators, who were able to gather Sayoc’s cellphone records and track his surveillance in Florida, an official told The Post.

A number of posts supporting Trump and others critical of the media and Democrats also helped lead investigators to Sayoc.

Investigators were able to connect the more than one dozen packages because some contained the same misspellings, the Post reported. According to the criminal complaint against Sayoc, some of the packages included the same misspellings found on Sayoc's social media postings. 

Investigators pointed to the misspelling of Rep. Debbie Wasserman SchultzDeborah (Debbie) Wasserman SchultzBiden: Families of victims of Surfside building collapse 'realistic' about rescue Biden intends to pick up costs to county, state in Florida building recovery efforts At least 99 people unaccounted for after deadly Miami-area building collapse MORE's (D), which was listed as the return address on some of the suspicious packages. The prominent Florida Democrat's name was spelled “Shultz” on the packages, according to the criminal complaint.

Suspicious packages were also sent to Wasserman Schultz, Sen. Kamala Harris (D-Calif.), Sen. Cory Booker (D-N.J.), Rep. Maxine Waters (D-Calif.), former Director of National Intelligence James ClapperJames Robert ClapperDomestic security is in disarray: We need a manager, now more than ever Will Biden provide strategic clarity or further ambiguity on Taiwan? 140 national security leaders call for 9/11-style panel to review Jan. 6 attack MORE and former CIA Director John Brennan. Both packages addressed to Clapper and Brennan were addressed to them at CNN's New York offices. 

The 13 total packages contained improvised explosive devices that consisted of PVC piping, a small clock, wiring, a battery and "potential explosives,” Wray said during Friday's press conference.

Evidence technicians also found a DNA sample of two of the homemade explosive devices, which was a possible match to DNA obtained when Sayoc had previously been arrested.

Sayoc, a former pizza deliveryman and strip-club worker from Aventura, Fla., has a lengthy criminal record that includes a prior arrest in connection with threatening to use a bomb.

The 56-year-old was charged with interstate transportation of an explosive, illegal mailing of explosives, threats against former presidents and certain other persons, threatening interstate communication and assaulting federal officers. He could face up to 48 years in prison if convicted.