Original sentence: A Thai protest leader, identified by police as Suthin Taratin, was speaking on top of a truck, which was part of a rally at a polling station where advanced voting was supposed to take place, when he was struck by gunfire, reports the BBC's Jonathan Head in Bangkok
Edited sentence: A Thai protest leader, identified by police as Suthin Taratin, was killed by a shot to the head during a confrontation with red-shirt supporters after leading a group of protesters to force the closure of a nearby polling station