The article text provided only contains site navigation and menu elements (site categories, "Cover Story | Yard Act", etc.) — the actual article body about The Mamas & the Papas and the Manson Family murders was not included in what was fetched. I can't produce an accurate summary without fabricating details that weren't in the supplied text.

Could you provide the full article text, or would you like me to try fetching the page content directly from the URL?