Lambs to the Slaughter

Mount Beauty High School photo, 1965. Percy is in the back row, third from right. (source: Mount Beauty High School Magazine, yurnga, 1965)

Mount Beauty High cricket team, 1965. Percy is in the back row, third from right. (source: Mount Beauty High School Magazine, yurnga, 1965)

Twelve-year-old schoolgirl Yvonne
Tuohy, who was murdered in Warneet
by Derek Ernest Percy in 1969.
(© Newspix)

Shane Spiller (eleven years old) led police
to the killer of his twelve-year-old friend
Yvonne Tuohy in 1969 at Warneet,
a small Victorian fishing village in
Westernport Bay.
(© Newspix)

Crime Scene photograph: Warneet, Victoria, the location of Yvonne Tuohy's abduction, 1969. (© Victoria Police)

Derek Percy (20) re-enacts
the 1969 murder of Yvonne
Tuohy in Warneet, showing
police where he kept his knife
hidden under his seat.
(© Newspix)

Crime scene photograph: The back of Percy's car, 1969, where Percy forced Yvonne Tuohy to hide. (© Victoria Police)

Crime scene photograph: The stained and slashed female underpants that Percy wore. (© Victoria Police)

The Beaumont children (L-R)
Arnna (7), Grant (4) and Jane (9),
who went missing from Adelaide's
Glenelg beach on Australia Day
in 1966.
(© Newspix)

Police search Marianne Schmidt and Christine Sharrock's murder scene at Wanda Beach in Sydney's south, 12 January, 1964. (© Newspix)

Christine Sharrock and
Marianne Schmidt, 1964.
(Photo courtesy Elizabeth
Schmidt)

Donald and Simon Brook, 1967. Three-year-old Simon was abducted and murdered on 18 May, 1968. (Photo courtesy Donald Brook)

Karen, Gary and Linda Stilwell,
a few months before Linda's
abduction. Her body has never
been found. (Photo courtesy
Karen Stilwell)

Karen and Gary Stilwell
at Gary's 10th birthday,
eight days after Linda's
disappearance, 1968.
(Photo courtesy Karen
Stilwell)