The court heard how after initially arresting two suspects, Heppenstall told the teenager, who was sitting on a sofa, to get out of the room and “go to bed”.
The boy refused, and Heppenstall pulled him up by his arm, before then putting his hand forcefully around the boy’s neck and being verbally abusive.
Bolton Crown Court heard one of the workers at the care home tried to intervene and pull Heppenstall away.
Greater Manchester Police said Heppenstall’s duties were restricted in January 2021.
Det Ch Insp Iqbal Ahmed said: “This was a shocking use of unnecessary and excessive force by Benjamin Heppenstall on a defenceless teenage boy who absolutely should not have been treated this way.
“Our officers have a really challenging role and are faced with instances that the general public will never experience.
“However, officers are trained to act professionally and proportionately, and it is clear here that PC Heppenstall acted beyond what was necessary when faced with a verbal refusal by the boy to do what he had told him to do.”
