The man suspected of opening fire in a New York subway station pleaded not guilty on Friday.

Frank James, the suspect whom New York police arrested for allegedly terrorizing commuters in a Brooklyn subway station, appeared at his arraignment on Friday, offering his plea. James is accused of injuring dozens of people during an April 12 mass shooting.

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James is charged with one count of committing or attempting to commit an act of terrorism or other violence against a mass transportation system and one count of discharging a firearm during a crime of violence.

Police identified James on April 12 and arrested him on April 13 after investigating recent social media posts that officials described as "concerning."

At least 28 people were injured, with five reportedly in critical condition, in the incident during the morning rush-hour commute, according to officials. Ten people were shot, and another 18 were injured as they ran off the train car and suffered smoke inhalation.

James allegedly put on a gas mask while entering a train heading for the 36th Street station when he opened a canister from his bag. The suspect then withdrew a firearm and fired 33 times, striking multiple people in the car and on the platform, according to authorities.

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James's defense has attempted to shift blame, claiming that the FBI unconstitutionally searched and questioned him upon his arrest, took multiple swabs of his DNA, and made him sign documents in his prison cell.

While the judge continued a detention order imposed after the suspect's arrest, he rejected consideration of a permanent order of detention until his next court date on July 25.