COLUMBIA, S.C. — The Marine Corps is considering possible punishments and potential courts-martial for up to 20 officers and enlisted leaders in the wake of investigations into the suicide of a 20-year-old recruit at its Parris Island training facility.

The results of three investigations released Thursday found trainees — and even some drill instructors — were subjected to repeated incidents of verbal and physical abuse at the s training site. It also faulted commanders for not paying enough attention to what was going on.

The investigations were sparked by the death of Raheel Siddiqui of Taylor, Michigan, a young Muslim who had told his relatives he wanted to become a Marine to serve his country. He died after falling nearly 40 feet in a stairwell.

An attorney for Siddiqui’s family, Nabih Ayad, has said the family has “always suspected hazing of some sort” in connection with his death.

Some of the 20 commanders and senior enlisted leaders have already been fired, including the three most senior Marines in charge of the recruit’s unit. The Marines also ordered that the rest be temporarily relieved, according to a statement sent to The Associated Press. Their punishments could range from administrative punishments, such as counseling, to the most severe action of military charges and courts-martial.