The Bill: Witness: Wall of Silence

SINOPSIS

Smithy tries desperately to keep Carly alive after she is shot - but she dies in hospital. On the estate, a mobile police unit is set up and a murder investigation begins. Maurice Thompson, a member of the public, gives the officers some valuable information, but it later emerges that he is lying. Carly's best friend Alisha tells Smithy that Marlon Reed is after her boyfriend.