Detectives trying to solve the case of a newborn baby found dead in a field believe the infant could have been kept in a fridge years before she was discovered - and say a pair of dirty pants holds the key to the investigation. Baby Ava's remains were found in a snowy field by a dog walker in Little Hulton, Salford, Greater Manchester , on November 20 last year. Police rushed to the scene and launched an investigation, involving experts who could help establish what happened to her, and how