(Spoiler Main) Did Ned purposely leave William Dustins body to rot in Dorne

This line by Catelyn always stuck with me..

'When Lord Dustin had beheld her naked, he'd told Ned that her breasts were enough to make him wish he'd never been weaned. Poor man, she thought. He had ridden south with Ned, never to return.'

—thoughts of Catelyn Stark

I don't think Ned personally wanted William dead but his Honor wouldn't let a slight against his new wife go unpunished. It's honestly the only reason I can see for why he really didn't seem to care for bringing one of his Lords bodies back North.