A fifth teenager has been charged with attempted murder after a man was found stabbed in a playground.
Hertfordshire Police said the man, who was 34 at the time of the incident, was discovered injured in Harwoods Recreation Ground, Watford, on 12 October.
The 17-year-old boy from West Bromwich, who cannot be named for legal reasons, has also been charged in relation to the supply of Class A drugs.
The force said the victim remained stable in hospital.
