Facial recognition expert claims Lord Lucan is alive

Computer scientist Professor Hassan Ugail's AI photo analysis technology has positively identified an elderly man in Australia as Lord Lucan, a British aristocrat who vanished in 1974 the day after brutally attacking his wife and murdering the family nanny.

Prof Ugail, who leads the Centre for Visual Computing at the University of Bradford, has assisted with identifying suspects of high profile cases such as the death of Saudi journalist, Jamal Khashoggi, and the Novichok poisoning of former Russian agent Sergei Skripal.

So how does his facial recognition technology work? What can it do and what are the limitations?