Police say William Davis, who was 92, died as a result of serious head injuries. His body was found in Willenhall on Sunday evening.
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200 tablets were found in a bag a 17-year-old boy was carrying into the event, at entrance of the festival.
35-year-old Shane Deakin was being hunted over a space of burglaries.
Officers say the drivers of two cars may have witnesses a fatal crash.