Michigan State Police case file 

Emmet County Sheriff Office case file

Robison Archive Petoskey District Library curated by Drew Cherven

Rick Wiles Michigan North Research

"The Six Who Died" WKNR radio series by Al Koski

"Massacre at Good Hart" by Hon. Richard Smith, retired

"Robison White Paper" by Ron Covault, Oakland Co. asst. prosecutor, retired

(compiled with Petoskey Library materials and for non-profit use)

Emmet County Sheriff Office TIPS line: (231) 439-8900