Washing and burying a severed leg found after its owner had been buried

Question:
He says: Honorable Shaykh, may Allah grant you success. A man died in an accident, and his leg was severed and lost. After he had been buried, it was found. Does it need to be washed on its own? The leg, and shrouded, and buried, buried in a separate grave. And if it is buried on its own, is a niche made for it? They did not dig a niche for it, only a grave.

Answer:
A grave is dug for it that prevents the smell from escaping, and, meaning, it is protected from dogs digging it up, and this is sufficient. But it is washed, it is washed and shrouded, wrapped in the shroud, yes.