New book 'The Face of Evil' tells story of victims of notorious serial killer Robert Black

Robert Black was one of the UK's most notorious serial killers, convicted of four murders of little girls, but suspected of many more. In 2011, he was found guilty of murdering nine year old Jennifer Cardy from Ballinderry, near Lisburn. He died in Maghaberry Prison in January last year. Jennifer's older brother Mark has contributed to a new book, The Face of Evil, which links Robert Black to many other murders across the UK, Ireland and Europe. Tara spoke to Mark along with the co-author of the book, Rob Giles.