The recently released criminal complaint against Faisal Shahzad revealed new details about how investigators were able to identify, locate, and apprehend the suspected Times Square bomber in under 52 hours.

Among the charges in the five-count complaint is an attempt to use a weapon of mass destruction, an attempt to kill or maim people and explosives charges.

When law enforcement sources say they found a trove of evidence inside the Nissan Pathfinder discovered smoking Saturday evening, the complaint offers details. Among other items, investigators found three keys. One was for an Isuzu, which is what Shahzad drives, and another opened the door to his Connecticut home.

According to the complaint, Shahzad took steps to hide his identity. He used a disposable cell phone for communicating with a fireworks distributer in rural Pennsylvania and the seller of the Nissan Pathfinder in Connecticut that he bought April 24. When he first met the seller, Shazad looked at the "interior seating and cargo area of the Pathfinder, but not the engine."

After paying 13 $100 bills for the Pathfinder, Shahzad insisted that no bill of sale be made, saying that it would be unnecessary.

Federal authorities are still trying to follow up on any potential leads to foreign terrorist groups. After his arrest, Shahzad, who is said to be cooperating, admitted that he recently received bomb-making training in Waziristan, Pakistan. Moreover, the disposable cell phone that has been traced back to him allegedly received at least four phone calls from Pakistan in the days leading up to the attempted bombing.