The functions of the Director of Public Prosecutions are set out in article 187 of the constitution of Guyana. These are:
1. To institute and undertake criminal proceedings against any person before any court, other than a court-martial, in respect of any offence against the laws of Guyana.
2. To take over and continue any such criminal proceedings that may have been instituted by any other person or authority.
3. To discontinue at any stage before any judgement is delivered any such criminal proceedings instituted or undertaken by him/her or any other person or authority.