A police officer has admitted making mistakes in the weeks before Valdo Calocane killed three people in Nottingham, a public inquiry heard today.

The junior officer described failing to arrest Calocane despite the killer having assaulted two colleagues at a warehouse in the weeks preceding his deadly attacks. The admission came during testimony at a public inquiry examining the circumstances leading up to the triple murders.

Calocane attacked a husband and wife who were his work colleagues before going on to kill three people in separate incidents in Nottingham. The warehouse assault represented a missed opportunity for intervention that might have prevented the subsequent killings.

The killer is currently serving a hospital order for the three murders. The public inquiry is examining whether there were systemic failures in the response to warning signs before Calocane carried out his attacks.

The police officer's testimony highlights potential gaps in the criminal justice response that allowed Calocane to remain at liberty despite having committed violent acts against his colleagues. The inquiry continues to examine the sequence of events and missed opportunities in the case.