Sefton Central Labour MP Bill Esterson said he was bitterly disappointed for a grieving Formby mum after Home Secretary Theresa May and Attorney General Dominic Grieve refused to look into the incident that left her 27-year-old son dead.
Scott Sheard was left with brain damage and unable to walk, talk or feed himself after receiving a single blow from a doorman while on an night out in Southport in 2009.
Scott died of septicaemia in January 2012.
Bill called on Home Secretary Theresa May and Attorney General Dominic Grieve to watch CCTV footage of the 2009 incident, after Assistant Deputy Coroner Martin Fleming accepted that the bouncer acted in self-defence, despite landing the strike without Scott attacking him.
But this week Theresa May said the case was in the hands of the CPS, who have already ruled out any further action.
Bill said he was appalled that the Home Secretary was "effectively washing her hands of Scott's case".
Bill said: "Theresa May and Dominic Grieve should at the very least watch the CCTV footage, which is extremely harrowing, before washing her hands of this case.
"What happened to Scott should not happen to anybody. What Scott went through, and what his family, particularly mum Fenella, have gone through warrants Theresa May taking some time aside to listen to the family's concerns.
"But Theresa May and Dominic Grieve aren't prepared to even do that. I am appalled."
Bill said the Home Secretary needs to think again about what training doormen and women are given.
Bill said: "The whole issue of training for door staff is crucial. Police officers are given lengthy and ongoing training to handle confrontation and avoid violent escalation. Door supervisors routinely face the same situations, yet they receive just 38 hours’ training to cover all aspects of their job.
"I hope that when the Home Secretary reconsiders, watches the CCTV footage of this tragic incident and I am sure she will agree with me that change in licensing standards and training is urgently needed."