By Patricia Hurtado May 5 (Bloomberg) — U.S. authorities looking for the person who tried to blow up a car in New York’s Times Square with firecrackers, propane, gasoline and fertilizer had a valuable ally: the suspect himself. Faisal Shahzad , who was arrested May 3 and charged with attempting to detonate a weapon of mass destruction in one of the busiest intersections in the U.S., left behind a trail of clues including the keys to his Connecticut home and a second vehicle as well as records of mobile-phone calls to a Pennsylvania fireworks shop and from associates in Pakistan. Shahzad may have been “purposefully hapless” so that his possible accomplices could see how the New York police responded to terrorist threats, said Michael Wildes , a former federal prosecutor in Brooklyn, New York. “The materials were rudimentary and the effort was captured on 87 different cameras,” said Wildes, an immigration attorney who represents defectors who cooperate with prosecutors in terrorism cases. “Anybody who has the tenacity to put together a bomb like this doesn’t make these kinds of mistakes. “Or, this may be the dumbest terrorist in the world,” Wildes said. Agents from the Department of Homeland Security arrested Shahzad at New York’s John F. Kennedy International Airport May 3 as he attempted to fly to Dubai, said U.S. Attorney General Eric Holder . Shahzad admitted his role in the plot, Holder said yesterday at a press conference in Washington. Training in Pakistan A U.S. citizen of Pakistani origins, Shahzad was charged with five counts, including attempting to use a weapon of mass destruction and receiving “bomb-making training” in the Waziristan region of Pakistan, after driving a bomb-laden Nissan Pathfinder into Times Square. His plot dated as far back as December, prosecutors said. Shahzad faces as long as life in prison if convicted of the mass destruction weapon charge or acts of terrorism transcending national boundaries, Manhattan U.S. Attorney Preet Bharara said in a statement. After receiving four calls from Pakistan on April 24, Shahzad called the seller of the Pathfinder twice and then bought the vehicle using 13 $100 bills, federal officials said in the criminal complaint. The next day, Shahzad called a store in rural Pennsylvania that sells M-88 firecrackers, authorities said. House, Car Keys Shahzad left his house key along with the key to his Isuzu Rodeo in the Pathfinder that he failed to blow up in Times Square, prosecutors said. The police used that house key to enter his residence and discovered fireworks and fertilizer in a garage. Shahzad left the Isuzu in the parking lot of the Bridgeport, Connecticut, supermarket where he arranged to buy the Pathfinder. Dubai-based Emirates Airlines said U.S. authorities removed three passengers from the May 3 flight from New York to Dubai. After the airliner left the gate and was recalled, Shahzad was arrested, according to a person familiar with the investigation. The other two people were later released, the person said. Shahzad was put on the federal no-fly list early on the afternoon of May 3, said a law-enforcement official who requested anonymity. Within an hour, federal authorities electronically sent out an advisory about his addition to the list. Airlines have to individually update their computer systems with the additions, and Emirates hadn’t done so, the official said. Customs and Border Protection officials discovered the suspect was on the plane after scanning a passenger manifest that airlines are required to submit about 30 minutes before takeoff, the official said. Onboard Arrest Emirates’ flight EK202 landed in Dubai seven hours late, at 2.45 a.m. An American passenger who declined to be identified said he saw three or four police officers enter the aircraft in New York and detain the three men, who were sitting in economy class. The men looked calm as they were taken away, he said. Shahzad got a bachelor’s degree in computer applications and information systems from the University of Bridgeport in 2000 and earned an MBA in 2005, said Michael Spitzer, the school’s provost, in an e-mailed statement. Shahzad worked for three years at Affinion Group Holdings Inc., a company controlled by Leon Black ’s private-equity firm, Apollo Management LP. Affinion, a provider of marketing and customer-loyalty plans, employed Shahzad as a financial analyst in its accounting department from 2006 until 2009, the company said. ‘Dumb Mistakes’ “Not all terrorists are created equally,” said Anthony Barkow , a former Assistant Manhattan U.S. Attorney who handled terrorism cases. “Although some plots are highly sophisticated, others are not. Just like common criminals, aspiring terrorists often get caught because of dumb mistakes.” Barkow cited the 1993 World Trade Center truck bombing as an example of terrorist ineptitude. After the attack, one of the plotters returned to the car-rental company to recover the deposit on the vehicle that held the explosives. “But none of this is to suggest what the law enforcement officials did here was anything other than extraordinary — they identified the perpetrator of this plot at the speed of a television show,” said Barkow, now the director of a center on criminal prosecutions at New York University Law School. “What is often dismissed as the speed of Hollywood fantasy here was reality.” New York Police Department Commissioner Ray Kelly at a news conference yesterday credited investigators for their fast work. “By my calculation, from the time Faisal Shahzad drove into and across Broadway and parked that vehicle, to when he was apprehended last evening at JFK Airport, it was 53 hours and 20 minutes,” Kelly said. “Now, we know that Jack Bauer can do it in 24” hours, Kelly said, referring to Fox Television’s “24” starring Kiefer Sutherland as the anti-terrorism agent Bauer. “But in the real world, 53 is a pretty good number.” The case is U.S. v. Shahzad, 10-00928, U.S. District Court, Southern District of New York (Manhattan). To contact the reporter on this story: Patricia Hurtado in New York at pathurtado@bloomberg.net