Complex sentence: David arrives in the morning and informs Raju that Mary is a Christian and shows an ornament which happens to be the one worn by Mahalakshmi when she was lost.
Split into simpler sentences: David arrives in the morning and informs Raju that Mary is a Christian. Her deception is uncovered when David shows Gopalamand shows an ornament which Mahalakshmi was wearing when she was lost.