Victims
Bonnie Williams
Diane Federoff
Barbara Spaulding
Sydney Monson
Susan Perry
Patricia Walsh
Mary Anne Wysocki
Christine Gallant
Barbara Spaulding
Serial Killers Podcast: Antone Costa
Profile: Antone Costa
Murderpedia: Antone Charles Costa
Wikipedia: Tony Costa
March 6 – 1969: Tony Costa is arraigned in 16 Cape Cod murders
Books
In His Garden: The Anatomy of a Murderer (The Cape Cod Murders)
Movies/Documentaries
Twisted: Cape Cod Casanova
Tony Costa
