Greene , December 29 , was arrested by police on 31 . He was initially charged with possession of an explosive substance . Police say they have evidence that Aaron Greene allegedly planned to target a monument . He allegedly told people he wanted to blow up Whittaker , police said .
Aaron Greene , 31 , was arrested by police on December 29 . He was initially charged with possession of an explosive substance . Police say they have evidence that Greene allegedly planned to target a monument . He allegedly told people he wanted to blow up the Washington Square Arch , police said .