The Bill: To Catch a Killer (Part 3)

Part three of three. A DNA sample seems to rule out cabbie David Russo as the murderer of nurse Manisha Devi - until it transpires that he has cancer and recently underwent a blood transfusion that could have affected the test result. Peter Baxter is stabbed by a traumatised Ruth Cohen, while June has a run-in with a 13-year-old arson suspect and later calls the station to report a rape - naming herself as victim