The increase of DNA samples being taken
and stored has led to a rise in
convictions, especially for crimes
committed a number of years ago.
The quality of DNA can now be
“amplified” using complex chemical
A sample of DNA can also now be
extracted from a single cell and
laboratory robots are being used to
speed up the process.
Last week Francisco Brizida, president
of the Institute of Legal Medicine and
Forensic Sciences, where the DNA library
is held, said: “Technology now allows us
to go further than years ago.”
But he said: “I wouldn’t like to be that
ambitious and say the secret to
unlocking the Madeleine McCann case lies
in our lab.”
A Portuguese police source said: “The
best hope is to pass the sample to
Police digs in Praia da Luz and
interviews with new suspects this summer
ended in disappointment.
The probe run by 30 officers in
Operation Grange has cost £10million.