The charge against him was that he had preferred a claim to...

The charge against him was that he had preferred a claim to prophethood after the line of Prophets had ended in Muhammad (PBUH) and he had thus misled other people to affirm faith in his claim of prophethood. The action against Musailama was taken immediately after the death of the Holy Prophet (PBUH) under the leadership of Hadrat Abu Bakr Siddique (may God be pleased with him), and it had the unanimous support of the entire body of the companions.