McCartan has been asked to attend a GAC hearing on Wednesday

McCartan has already been charged with assaulting Kenny Larkin, and the player has received a summons to appear in a Dublin court on 3 March.

The GAC has requested the investigating Committee to interview other witnesses about the alleged incident last May.

The GAA wants to conclude its own findings before the court date.

McCartan is the manager of the Queen's Sigerson team who defeated St Mary's in Belfast on Wednesday afternoon.

The alleged incident occured in a challenge game in Newcastle county Dublin although McCartan was not cautioned or sent off in the game.

After the match, 20-year-old trainee garda Larkin underwent surgery which resulted in the insertion of three plates in his jaw.

The player also lost two teeth and his jaw was wired for almost a month which meant that he had to have his food liquidised.

In December, McCartan's legal advisor Joe Rice said that he would take out a court injunction to prevent any further investigation of the matter by the sporting body in advance of the trial.

Rice said that his client was determined to do everything possible to clear his name.

In August, McCartan was approached by two members of the gardai after attending a preliminary GAA hearing into the case at Croke Park.