Cuckoos on the Mersey. A Scream in the Darkness.

The Third in the series.
Jo Lilly and the Child Protection Team are working with several families in the same area, where their teenage children are being groomed by the local drug dealing network. The police unit working with them, (Protecting Vulnerable Persons Unit) are seriously concerned about the trend of recruiting younger victims, some as young as ten. When two schoolboys are stabbed on the way to school, a double murder investigation begins. Knife crime is a growing concern across the UK and the press focus on the investigation. Macy Bray, age 14 vanishes. The only clue is that witnesses reported hearing a scream in the darkness. Was Macy connected to the ongoing investigation or is something even more sinister in play?