A South Australian police officer who allegedly restrained a teenage boy and performed an exorcism during a church youth camp in April has appeared in court.

Roger Sketchley, 28, is charged with false imprisonment and aggravated assault over what allegedly occurred at a Lutheran camp at Tanunda in the Barossa Valley.

Kym Thomas Bisset, 24, Stuart David Reimann, 22, and 45-year-old Michael John Schultz are facing similar charges over their alleged involvement in the exorcism.

They faced Adelaide Magistrates Court along with Sketchley.

He has been stood down from duty and is to appear in court again next week.

A church spokesman has previously told the media the alleged incident is not condoned by the church and should not have happened.