Telly appeals into murder hunts.
DETECTIVES probing two murders will appeal for information on the BBC's Crimewatch programme tonight.
Police will ask for help to catch the killers of retired Birmingham teacher Betty Yates, who was stabbed to death in Bewdley, and Andrew Heath, who died in an arson attack on his Worcester home.
Mrs Yates, aged 77, was found dead at her Bewdley cottage on January 4.
Crimewatch presenter Kirsty Young will repeat an appeal by investigators to the anonymous writers of two letters in the hunt for her killer.
The letters, one typed and one hand-written, were handed in to police and detectives believe the authors could hold vital clues in the case.
Det Chief Insp Neil Jamieson, who is leading the inquiry, said: "The letters have opened up new lines of inquiry for us but we can only establish the value of the details in them by talking to the people who wrote them.
"We recognise they might be reticent but they can speak to us in complete confidence."
Mr Heath was found in his home in Chedworth Close, Warndon, Worcester, after a fire on December 14.
Crimewatch will feature a reconstruction of the night he died.
Charity Crimestoppers has offered a pounds 10,000 reward in both cases for anyone providing information leading to the arrest and conviction of those responsible for the deaths.
Crimewatch will be shown on BBC1 tonight at 9pm.
Found dead: Betty Yates and Andrew Heath.