During the reign of his father, Tun Muhammad settled at Chenor. When the news of the murder of his brother, Tun Abdul Mutalib, reached him, Tun Muhammad hurried to Pekan with his troops. At Pekan, he found that the murderer, Temenggong Abdul Jamal had left for Riau. In spite of his father's attempt to restrain him, he followed the Temenggong. On his arrival at Riau, he found that the demented Abdul Jamal was dead.
