Serious doubts have been raised about the arrest of the alleged "lone wolf" al-Qaeda sympathiser in New York, after the extent of a police informant's involvement in the case became clear.
The FBI declined to investigate Jose Pimentel, 27, after concluding that an NYPD informant may have gone too far in assisting his alleged bomb plot, according to several reports.
Mr Pimentel, a US citizen born in the Dominican Republic, was charged with various terrorism offences after allegedly building bombs for attacks on New York troops, police and other officials.
Mayor Michael Bloomberg said he was inspired by an al-Qaeda magazine article about bomb-making and "motivated by his own resentment of the presence of American troops in Iraq and Afghanistan".
But the FBI and federal prosecutors were notably absent from Mr Bloomberg's press conference on Sunday night, and the case is instead being handled by New York state prosecutors.
Mr Pimentel is believed to have smoked marijuana with the informant before making statements that were recorded and used against him.
Officials told the Associated Press that the FBI concluded that he had neither the "predisposition or the ability" to carry out his alleged plot.
It is also alleged that the convert to Islam attempted to circumcise himself while being monitored by police.
Mr Pimentel's lawyer, the NYPD and the FBI's New York office did not respond to requests for comment.
Kelly Langmesser, a spokesman for the FBI’s New York office, said: “The FBI was made aware of this case through the joint task force it has with the NYPD and 50 other law-enforcement agencies. But the decision was made to arrest him on state charges rather than to pursue him through the FBI itself".