While he was doing research for chemistry, Lavoisier was also working at the house. During this time, the French Revolution began in 1789. Antoine kept his position in the government. But, two years later, a new government arrived in power. This new government was suspicious of Lavoisier's great success as a scientific researcher and as a public administrator. He was accused of selling modified tobacco. He was arrested for conspiracy against the people. Even though there was no proof that showed that Antoine de Lavoisier broke the law, he was sentenced to death on 8 May 1794. He was executed using the guillotine.