In 2008 it was revealed that, since the shootings, up to 20 people had been arrested for questioning but none had ever been charged. In January 2010 a reserve Police Service of Northern Ireland officer (formerly an RUC officer) was arrested by detectives from the Police Ombudsman's Office and questioned over "perverting the course of justice" and "aiding the killers' escape". Later that year, the Public Prosecution Service (PPS) concluded there wasn't enough evidence to prosecute. In reply, the Ombudsman's Office said it would consider disciplinary action against the officer.