a case study also known as a girl in freezer.

2.  In August 2001, a man
walking his dog in Lindley
Woods, near Otley, in West
Yorkshire, found the body
of 16-year old Leanne
Tiernan, buried in a shallow
grave. This was about ten
miles from her home in
Landseer Mount, Bramley,
Leeds. She had been
walking home from a
Christmas shopping trip
with her best friend in
November 2000 when she
disappeared.

3.  She had a black plastic bag over her head, held in
place with a dog collar, with a scarf and cable tie
around her neck, and cable ties holding her wrists
together. Her murderer had then wrapped her body in
green plastic bin liners tied with twine.
 In the largest search in West Yorkshire, the police
searched around 800 houses and 1500 gardens,
outbuildings and sheds on her route from the bus
stop to her house, as well as searches of a three-mile
stretch of canal, drain shafts and moor land.

4.  The pathologist examining her
body said that it had not been
there since November. She had
been strangled and her body
stored at low temperatures in
the intervening time

5.  Police tracked down suppliers of the dog collar and found that a man
from Bramley had bought several similar to the one found around
Leanne Tiernan’s neck. His name was John Taylor, and he was a
poacher who had been seen around the woods where the body was
found.
 The twine was an unusual kind, used for rabbit netting, and was
tracked down to a supplier in Devon, which had only produced one
batch. It matched twine found in John Taylor’s home.

When the police searched John Taylor’s house they found more of
the cable ties and one of the dog collars

6.  The scarf tied around Leanne Tiernan’s neck had
a few hairs caught in the knot. Unfortunately, there
was not sufficient DNA in the roots for standard
DNA profiling. However, the scientists found very
small amounts of DNA in the hair shaft and used
mitochondrial DNA testing to match it to John
Taylor.

7.  There were dog hairs on Leanne Tiernan’s
body, and scientists in Texas produced a
partial dog DNA profile – this was the first
time a British murder investigation had used
dog DNA profiling. However, John Taylor’s
dog had died, so this could not be used in
evidence.

8.  Forensic scientists found a strand of pink
carpet fibre on her clothes, with specific
patterns of dye. Though John Taylor had
destroyed the carpet by burning it, police
found strands around a nail that matched the
fibre on her jumper. Searching under the
floorboards, police found bloodstains that the
forensic scientists identified as belonging to
Leanne Tiernan.

9.  John Taylor was arrested in
October 2001, and
sentenced in July 2002. In
February 2003, he was
convicted of two rapes,
based on DNA evidence,
and given two additional life
sentences.

10.  Estimating the time of death
 How the hairs and fiber's on the clothing and
carpet would have been analyzed in
 The way the bloodstains found under the
floorboard were identified in