Former British sprinter and hurdler Kriss Akabusi tried to persuade Collins to stay on in case there was a chance of him being allowed to run in the relay.
The cast, which is gold-coloured, was originally exhibited alongside body cast sculptures of Dame Kelly Holmes, Kriss Akabusi, Sally Gunnell and Paralympian Darren Leach in Body Casting Olympians at the Mall Galleries in May 2012.
Mr Stewart went on to suggest that Mr Shahid had been involved with the other men in a series of events leading up to the death of Kriss Donald, including buying petrol and driving to the Clyde walkway where the teenager was stabbed and set on fire.