How did Meriwether Lewis die?

Meriwether Lewis was the famous Lewis in the expedition of lewis and clark expedition across the louisiana purchase. in the early 1800's he was found dead in an inn he stayed at until he could reach the washington coast once again. he had syphilis (sp.) which caused his paresis. he was also burdened with a secret that would ruin Thomas Jefferson's presidency. he had two wounds. one in his head and one from his chest to his lower spine. these were not fatal. the question is did he die from murder or did he kill himself. explain your reasoning.