Police believe the drug ecstasy may have contributed the death of a man found with multiple wounds at his home in Salford.
Travis Barber, who was a personal trainer, died on Sunday evening.
A post mortem proved inconclusive.but police don't believe anyone else was involved.
His family say he was "a beautiful boy in every way."
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TV presenter Keith Chegwin has died aged 60 following a "long-term battle with a progressive lung condition", his family said.
A 14-year-old girl was declared dead at the property before an eight-year-old boy and seven-year-old girl died in hospital.