Is Derbyshire ‘double killer’ still on the loose?

Wendy Sewell and Barbara Mayo.Wendy Sewell and Barbara Mayo.
Wendy Sewell and Barbara Mayo.
In 1973 a young woman named Wendy Sewell was murdered in a brutal attack at Bakewell cemetery.

The killer was never caught and could still be at large. They may have even committed another infamous murder even close to home near Chesterfield..