Indeed. But there's a bit more to the story:
At about 9:00 a.m. on February 24, Clark sent a message to the fort demanding Hamilton's surrender. Hamilton declined, and the firing continued for another two hours until Hamilton sent out his prisoner, Captain Helm, to offer terms. Clark sent Helm back with a demand of unconditional surrender within 30 minutes, or else he would storm the fort. Helm returned before the time had expired and presented Hamilton's proposal for a three-day truce. This too was rejected, but Clark agreed to meet Hamilton at the village church.
Before the meeting at the church, the most controversial incident in Clark's career occurred. Unaware that Clark had retaken Vincennes, a war party of Indians and French-Canadians came into town. There was a skirmish, and Clark's men captured six. Two of the prisoners were Frenchmen and were released at the request of the villagers and one of Clark's French followers. Clark decided to make an example of the remaining four Indian prisoners. They were made to sit down in view of the fort and then tomahawked to death; the bodies were scalped and then thrown into the river. Although Hamilton did not witness the executions, he later wrote that Clark had killed one or more of the Indians with his own hands. Some historians believe that Hamilton exaggerated because, after being imprisoned by the Americans for war crimes, he had motivation to make his captors seem even worse. Clark did not claim to have been one of the executioners, but he wrote about the killings without apology, believing them to be justifiable revenge for murdered Kentucky settlers and a means to intimidate Indians into stopping their raids.