The Remorseful Robber by Cole Chase

Christopher Piantedosi became an overnight media sensation dubbed "The Remorseful Robber" when in 2011 he snatched a woman's purse at a Market Basket in Plaistow, New Hampshire, then a few days later returned the contents, along with a note of apology, to the woman at her home. The house of cards that was his life spiraled out of control, ending in murder.