Police are re-appealing for the public’s help following a fatal house fire in Harlow five years ago.
Six members of the same family were killed in their home on Barn Mead on the 15th October 2012.
Doctor Sabah Usmani and her five children died – father Doctor Abdul Shakoor was the sole survivor.
A murder investigation was launched at the time – but no one has been brought to justice.
To date – 500 witness statements have been taken and nearly two thousand pieces of evidence gathered.