He was charged with lewdness and littering.
Holmdel Sgt. Theodore Sigismondi said Tramaglini was there to run on the track just before 6 a.m.
The superintendent for the Kenilworth School District in New Jersey is accused of defecating on or near the football and track fields of a high school "on a daily basis", police said Thursday. The charges were filed Monday, according to published reports.
Staff and the school resource officer monitored the area and identified Tramaglini as the suspect.
ABC News was unable to reach Tramaglini for comment.
Kenilworth Public Schools Superintendent Thomas Tramaglini asked for and was granted a paid leave of absence, the district said Wednesday.
While the case is pending against Tramaglini, Brian Luciani, the Kenilworth district's director of academics, will handle the duties of superintendent to ensure that the district continues "its responsibilities without interruption", according to a statement released by the Kenilworth school board.
The board noted that it can withhold pay only "in the face of indictments or tenure charges, as a matter of state law".
Many on social media jumped to Tramaglini's defense. The Asbury Park Press said he declined to answer questions from a reporter outside his home.
"When ya gotta go ya gotta go", one comment stated.
Since his arrest, Tramaglini has taken a paid leave from his position, which pays an annual salary of $147,504.