DENVER -- Here's the timeline we've gathered so far on the terror investigation that has centered on an Aurora man.

Najibullah Zazi was born in Pakistan, moved to Queens as a child and is eligible for U.S. citizenship in October 2009. (Source: Zazi's attorney and aunt.)

Zazi is married to a woman who lives in Pakistan, whom he visits about once a year. He has tried, unsuccessfully, to have his wife entered into a special immigration program. (Source: Zazi's attorney)

Zazi lived in New York for about nine years prior to moving to Colorado. (Source: Zazi's attorney)

Thursday Sept. 10 -- Zazi's rental car (which is rented out in his father's names) is stopped on the George Washington Bridge as he was entering New York City. He was told it was a random drug checkpoint. A dog is used to "sniff" around the car. Zazi spends time visiting friends in NYC and trying to solve an issue with a vending cart of which he has partial ownership. (Source: Zazi's attorney)

Friday Sept. 11 -- Zazi's rental car is towed while in NYC. (Source: Zazi's attorney)

Saturday Sept. 12 -- Zazi retrieves the car from a police station and believes it and his laptop computer (still inside the car) have been searched. (Source: Zazi's attorney)

Sat. or Sunday -- Zazi flies back to Colorado.

Sunday, Sept. 13 -- FBI operation underway at DIA. It's not known if this is connected.

Monday Sept. 14 -- Federal agents execute search warrants on several addresses in NYC, including one where Zazi stayed with friends. Agents find newly purchased backpacks, but no bomb-making material. (Source: ABCNews) Zazi is publicly discovered as the "Najibullah" federal agents in NYC were asking about/tracking. He denies any ties to terrorism, al-Qaeda, and denies he has any plan to do harm to anyone in the United States.

Wednesday, Sept. 16 -- Zazi and his attorney meet with federal agents in Denver at 2 p.m. Zazi submits DNA, hair, and handwriting samples and is interviewed for hours. About 2:30 p.m., Zazi's Aurora apartment is searched, as well as the home of his aunt. Several suitcases are removed from the apartment. About 11:30 p.m. Zazi returns to his apartment.

Thursday, Sept. 17 -- Zazi undergoes a second day of questioning.

Friday, Sept. 18 Zazi undergoes a third day of questioning and there are reports that Zazi has agreed to plea deal. Zazi's attorney denies that there is a plea deal.

Saturday, Sept. 19 Another round of FBI questioning is refused. By Saturday night, Zazi and his father are arrested at their Arapahoe County home.

Monday, Sept. 21 Zazi and his father appear in federal court.