Not strictly in just his undies, but jeans pulled down to show his very nice well-fitting blue briefs - which I am pretty sure he has shat (I don't think that darkness in the crotch between his thighs is just a trick of the light?).
"Kaseley (Sea). Rajesh Patel, resident of King Bilhar, who was on the cremation ground at the Shamshan Ghat, sensationalized after receiving the floating body of father Ganesh Patel. Police have started explanation while maintaining the morgue. - Pradee "
Well that's clear then! My guess is he poisoned himself - nice bulge in his blue briefs anyway.