The 30-year-old coast guard officer at the center of controversy over Sunday’s death of a 48-year-old speedboat operator, has been granted extra time to give evidence in the case, sources said yesterday. It was not clear when he would give his version of events to investigating authorities. The officer has been charged with manslaughter via negligence after he shot and injured Dimitris Makriyiannis, who had been called to submit to an inspection of his inflatable dinghy off the island of Chios, along with another two men. The man, who was shot in the arm, later died from a heart attack and severe shock caused by the bullet injury. The treatment offered to Makriyiannis has since split the medical community with coroners questioning the quality of assistance provided to the victim after he was injured.