Police are questioning a 49-year-old man after a man's body was found in Arnold on Monday evening.
He is thought to have been shot.
The house on Laneham Avenue has been examined by forensic officers.
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The mother, her husband and their son were found stabbed at their home in Stourbridge shortly after 8am on Thursday.
Cloud clearing, then a dry, bright and warm day.
Ending warm with some sunshine.