Federal charges are now being filed against Ahmad Khan Rahami, the man believed to be behind this past weekend's bombings in Chelsea and New Jersey.
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Rahami, 28, is being charged with several counts of using weapons of mass destruction, bombing a public place, causing destruction of property with fire or explosives and using a destructive device to cause crime and violence.
He is still recovering in a hospital in Newark, N.J.
The federal complaint says Rahami was seen on surveillance video near both spots where bombs were placed.
Federal authorities also say they later found his fingerprints on the un-detonated pressure-cooker bomb recovered on 27th Street the night of the Chelsea bombing, which injured more than two-dozen people.
The complaint says Rahami purchased cell phones in 2015 which were used as timers for the explosives.
It says he also bought bomb components online in the months before the attack.
Investigators say the suspect allegedly kept a YouTube account in which he listed two Jihadist anthems in a list of favorite videos.
They also found a journal in which he referred to Osama Bin Laden as "brother."
The FBI has acknowledged it interviewed Rahami's father after he told authorities his son was a terrorist back in 2014.
He said his son was being violent towards their family, even stabbing his brother.
Sources say Rahami's father later recanted the tip and changed his story.
After conducting their investigation, the FBI concluded that it could find no links between Rahami and terrorism.
Speaking to reporters Tuesday, the father says he contacted authorities because his son was causing trouble and not because of terrorist motivations.
Mohammad Rahami, suspect's father: They checked that almost two months. They said he's OK, he's clear, he's not a terrorist. I said OK. Now they say he's a terrorist. I say OK.
Q: Why did you call the FBI two years ago?
Mohammad Rahami: He doing bad.
Q: What did he do bad?
Mohammad Rahami: He stabbed my son, he hit my wife, and I put him to jail.
Rahami was not prosecuted for the stabbing after a grand jury declined to indict him.
Two officers were injured and Rahami was hit in the leg during a shootout with New Jersey police Monday.
New Jersey prosecutors charged Rahami with attempted murder of a police officer.
Meanwhile, residents in Chelsea are working to get their lives back to normal in the days after the bombing.
Mayor Bill de Blasio, along with city and homeland security officials, toured the area Tuesday to offer support and listen to concerns from New Yorkers.
The mayor also stopped by "Visions," a support center for the blind close to where the blast occurred on 23rd Street.
Emergency Management Commissioner Joseph Esposito praised the city for moving so quickly after the bombing.
"No city in this country that's more prepared to prevent or react to a terrorist attack. I think we showed that here on 23rd Street — the quick response, the way the street is back to normal two days later — it's just unbelievable," he said.
Officials say 23rd Street was completely reopened to traffic Monday night.