Lewes Crown Court
Amy El-Keria died in November 2012.
Zahid Naseem denies murdering Christina Abbotts.
Russell Bishop is already serving a life sentence for another crime.
Michelle Savage had reported her estranged husband twice to police.
The girls were found in a woodland den 32 years ago.
The former sergeant hid recording equipment in imitation plug sockets.
A teacher has pleaded not guilty to abducting a teenage girl, as he appeared in court via prison videolink. Jeremy Forrest
A former teacher told a girl's parents she needed extra help at school as a ruse to allow him to groom her for sexual abuse
A woman has been jailed for seven years after being found guilty of smothering her three-year-old daughter to death, six
A mother spoke of her "complete and utter shock" at discovering her three-year-old daughter dead in her bed - six months