Markle to Mother: 'Thanks for All Your Help' by Gwen Moritz Posted 9/30/2002 12:00 am Updated 5 years ago Next to the shocking deaths themselves, the most explosive element of the John Markle murder-suicide case was the 12-page letter that he left behind for his mother. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 15 days. Purchase Now Already have archive access? Login to view this article.