Cold case, hot evidence: DNA breakthrough jails 70-year-old paedophile after 30 years

A 70-year-old man, David Pearce, has been sentenced to 18 years in prison after a Metropolitan Police cold case investigation produced a one-in-a-billion DNA match linking him to the sexual assault of children in Barking, east London, in 1990 and 1996, as reported by PM News Nigeria.

For three decades, David Pearce walked free. A wooden bench remembered what the database couldn’t — until science caught up.

Pearce, 70, of Cambridgeshire, was sentenced to 18 years at Snaresbrook Crown Court on Friday, July 3, after pleading guilty to seven sex offences rooted in crimes committed more than 30 years ago.

In 1990, Pearce approached four children at a lido in Barking, east London, using a lost-keys ruse to lure them into a changing area where he forced them to undress and indecently assaulted them. The youngest victim was just eight years old. Quick-thinking children immediately reported the crime, allowing officers to recover semen from a wooden bench — yielding a DNA profile that matched nothing in the database at the time.

The case stayed open. Justice waited.

The breakthrough came in 2019 when Pearce was arrested for a voyeurism offence. His DNA produced a one-in-a-billion match to the 1990 crime scene. Investigators then linked him to a strikingly similar 1996 assault on a 13-year-old girl in a Barking park — the same lost-keys trick, the same predatory pattern. The victim later identified Pearce in a police parade.

His residence near the 1990 lido and ownership of a nearby food truck in 1996 further solidified the case.

Detective Constable Tony Anionwu of the Met’s Specialist Crime Unit described Pearce as “a predator who disguised himself as someone in a position of trust to exploit and assault young children.”

Forensic scientist Bridget March credited the scientific advances that cracked the case: “The discovery of the match to Pearce’s DNA profile ultimately paved the way to secure admissible evidence.”

Pearce denied additional charges relating to 12 other children from the 1990s, which were left on file.

The Metropolitan Police has committed £10 million to upgrade victim interview facilities, reaffirming its pledge to deliver justice regardless of when crimes occurred.