Police are still investigating the fatal stabbing of 75 year old Mohammed Saleem in Small Heath on Monday evening.
They have released CCTV of the night he was killed in the hope that witnesses will come forward.
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An NHS trust declined the £2,500 raised by a group of men dressed up as female nurses saying the costumes were "insulting".
The 15th century penchant was discovered by a metal detectorist just outside the moat of Kirby Muxloe Castle in Leicestershire.
Mohammed Ismaeel Ashraf died after suffering a severe allergic reaction but an inquest heard that he was not given an Epi-Pen straight away.