(CNN) - An active-duty soldier involved in a highly publicized altercation with a reporter had not requested permission from his superiors to be part of a security team at an event for an Alaska Senate candidate where the incident took place, a base spokesman said Wednesday.
Fort Richardson spokesman Sgt. Maj. Derrick Crawford said that Spc. Tyler Ellingboe, 22, had not had not requested permission from any chain of command to work outside his regular Army duties.
A second soldier involved in the incident, Sgt. Alexander Valdez, 31, had gotten permission from his previous chain of command, Crawford said, but not from his current chain of command.
The soldiers were working as part of Republican candidate Joe Miller's security team when they handcuffed a reporter from the Alaska Dispatch, who was trying to ask the candidate questions.
Crawford said Tuesday that commanders at Fort Richardson, where the soldiers are based, were investigating.
The two soldiers were working for a company that was hired by the Republican candidate for security purposes.
It is not against Army rules for the soldiers to take outside work, but Crawford said they must have written permission from their commanders and their work must not jeopardize their unit's readiness, good order or discipline.
The Army is also investigating whether the soldiers violated rules forbidding involvement in political campaigns. Fort Richardson investigators are trying to determine whether the soldiers' employment by a third party who was hired by Miller's campaign shielded them from a violation of those rules.
- CNN's Brian Todd and Larry Shaughnessy contributed to this report