Police divers from marine support unit are continuing to search the lake in Dagenham where a severed human male leg was discovered.
One of the anglers who made the gruesome discovery at White Hart Lakes says he is "still in state of shock"
He described flipping it over with a stick before he realised what it was.
Detectives are stlll looking into the possibility that the severed limb may be linked to the disappearance of Neil Buchel.
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A 24-year-old man has been arrested on suspicion of murder after the body washed up on the Thames shoreline.
Seven people have now been arrested after a man died from serious head injuries
The 38-year-old officer was on his way home from a night shift when he collapsed. His death is not being treated as suspicious.