Information Commissioner Office (ICO) Supports PSNI Withholding Evidence. Press Release. The Information Commissioner’s Office (ICO) has upheld Police Service Northern Ireland’s (PSNI) refusal to release basic information relating to fingerprint evidence police gathered in the aftermath of the McGurk’s Bar Massacre in 1971. The families believe the police have either destroyed the evidence or it … Continue reading Information Commissioner’s Office ICO Upholds Police Decision to Withhold Fingerprint Evidence