55 years ago, all six members of the family were slain in their Lake Michigan cottage near Good Hart. Their killer was never caught. — Read on www.petoskeynews.com/story/news/history/2023/07/08/robison-murders-in-good-hart-still-haunt-55-years-later/70372285007/ 55-year-old murder mystery still haunts N. Mich.Entire family slain at cottage; officials have never quit case Jillian FellowsPetoskey News-Review USA TODAY NETWORK GOOD HART – Author Mardi … Continue reading Robison murders in Good Hart still haunt 55 years later