Fifty-nine-year-old Gualberto Gonzalez is charged with harassment.
Authorities tell The Times of Trenton they learned that the Lawrenceville Intermediate School Spanish teacher does not own any guns.
The alleged threat was made Oct. 22 and reported to school officials and police the next day.
A working phone number could not be found for the teacher.
Information from: The (Trenton, N.J.) Times