WHO KILLED ELIZABETH ANN METZLER?

As reported by https://www.websleuths.com/forums/threads/md-elizabeth-metzler-10-abducted-murdered-anne-arundel-county-6-dec-1971.47766/ , Elizabeth Ann Metzler was abducted after leaving Ridgeway Elementary School at 1440 Evergreen Road in Severn, Maryland. The link https://www.washingtonpost.com/archive/local/1977/08/03/maryland-inmate-charged-in-1971-death-of-girl-10/3dffb677-8ebf-4ecd-8e6d-ace6dccf84d3/ reports the confession of Richard Miles Chaney, an employee of an Odenton garage made to policemen Gordon March and Thomas Mock. The trial then took place in 1978 with Judge