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| Courtesy Melissa Medina. Police are looking for a possible additional witness to a police shooting March 28. Al Hartmann | The Salt Lake Tribune Salt Lake Police investigate the scene at 300 South and West Temple Friday morning March 28 Steve Griffin | The Salt Lake Tribune Salt Lake City Police Chief Chris Burbank talks about the condition of the two Salt Lake Al Hartmann | The Salt Lake Tribune Salt Lake City Police investigate the scene at 300 South and West Temple at 6:30 a.m. Friday Al Hartmann | The Salt Lake Tribune Salt Lake Police investigate the scene at 300 South and West Temple Friday morning March 28 Al Hartmann | The Salt Lake Tribune Salt Lake City Police investigate the scene at 300 South and West Temple at 7:30 a.m. Friday Christopher Leo Knight -- who allegedly shot and wounded two Salt Lake City police on Friday, March 28, 2014 -- was shot and kille Steve Griffin | The Salt Lake Tribune Salt Lake City Police Chief Chris Burbank talks about the condition of the two Salt Lake Al Hartmann | The Salt Lake Tribune Salt Police investigate the scene at 300 South and West Temple at 7:30 a.m. Friday morning M Steve Griffin | The Salt Lake Tribune Salt Lake City Police Chief Chris Burbank talks about the condition of the two Salt Lake Al Hartmann | The Salt Lake Tribune Salt Lake Police investigate the scene at 300 South and West Temple Friday morning March 28 Al Hartmann | The Salt Lake Tribune Salt Lake City Police investigate the scene at 300 South and West Temple at 6:30 a.m. Friday Al Hartmann | The Salt Lake Tribune Salt Lake Police investigate the scene at 300 South and West Temple Friday morning March 28 Al Hartmann | The Salt Lake Tribune Salt Lake City Police investigate the scene at 300 South and West Temple at 6:30 a.m. Friday Al Hartmann | The Salt Lake Tribune Salt Lake City Police investigate the scene at 300 South and West Temple at 6:30 a.m. Friday