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He said he had witnessed several occasions in which Palestinians appeared to have been seriously hurt, including one man who had a full can of pepper spray in his face, and a woman who he said was hit with the metal part of a stun grenade, improperly fired into a crowd.

Three years later, a mobile trailer caught fire during a training exercise, when a non-explosive device used to simulate a stun grenade started a fire that engulfed the trailer.

The three-week inquest heard Mr Ciolac, originally from Cernavoda in Romania, entered the police station compound through a sliding gate at about 10:00 BST before a Taser, a baton round and a stun grenade were used, and he was shot in the abdomen minutes later.

The man, who can only be referred to as Officer A due to legal reasons, told the inquest jury at Derby Coroner's Court on Monday that Mr Ciolac was "closing him down" and he had fired his carbine rifle after a stun grenade and a baton round were ineffective.

The court heard Officer B, who was described as the more experienced firearms officer of the two, deployed a stun grenade and then a baton round to try to stop Mr Ciolac's advance.