This is a really tragic one, happening 99 years ago and the killer was never caught. On 6th January 1908 7 year old Madge Kirby was playing with her friend in Farnworth St when a man asked her to go with him for some sweets. She was never seen alive again. Her body was found on 21st August in Great Newton St, having clearly been removed from its hiding place in a nearby derelict property. Within two weeks of being laid to rest, Madge's father died of a broken heart, having lost his wife just 3 months before Madge disappeared. There'smore information on the following websites:-

http://detectiveandrews.tripod.com/madge.html
http://www.old-merseytimes.co.uk/liverpooltragedy.html