A NY man has been charged with building a 200-pound bomb he allegedly planned to detonate on Washington's National Mall on Election Day.
"As alleged, (the man) concocted a twisted plan to draw attention to his political ideology by killing himself on the National Mall in Washington, D.C. - risking harm to many others in the process", U.S. Attorney Geoffrey S. Berman said.
Rosenfeld allegedly supported a political belief called sortition, which advocates for random selection of government officials.
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Assistant Director-in-Charge William F. Sweeney Jr. said that the suspect "planned to detonate a large explosive to kill himself and draw attention to his radical political beliefs".
On Tuesday, the Federal Bureau of Investigation raided his home in Rockland County and found a workable bomb in his basement.
When FBI agent searched his home after getting a tip from a concerned citizen, they found "what appeared to be a functional explosive device weighing approximately 200 pounds".
Rosenfeld had previously constructed several smaller explosive devices for practice, according to the complaint.
Federal agents first learned of the plot after Rosenfeld described his plans in letters and text messages he sent to an unidentified person in Pennsylvania between August and September, the complaint said.
William Sweeney Jr., the assistant director of the FBI's NY field office, said in a statement that Rosenfeld meant to "detonate a large explosive to kill himself and draw attention to his radical beliefs".
Rosenfeld agreed to answer questions and, in an interview with law enforcement, stated that he ordered large quantities of black powder - an explosive substance - over the Internet, which he transported from a location in New Jersey to his home in Tappan.
Rosenfeld made his first appearance in federal court in NY on Wednesday, charged with unlawfully manufacturing a destructive device and also interstate transportation and receipt of an explosive.
Rosenfeld made his first appearance in NY federal court earlier Wednesday. He faces up to 20 years in prison if convicted.