"dateline." sam and danielle had a story book marriage. then one tragic afternoon their worlds came crashing down destroyed by a series of bulg lets and a senseless killing. as investigators began to dig, they realized not all was as it seemed. they had ent a thorny maize of marital betrayal. here is tangled web. >> sarasota, florida, long walks, gorgeous sun sets and the slow rhythm of a agenda will golf tide. stories of love abound in this city by the sea but not all ended happily ever after like the one that unfolded here in the summer of 2012. >> 911. is what is the case of your imagine? >> it's a twisted love story.