Bloody Sunday: The Legal View

If i had been guilty of a murder 38 years ago and due to new proccesses i was found out to be that murderer , would i just be left to get on with my life or would i be prosecuted for the murder ?? What would be the right thing to do by the pps .?? We must remember that one soldier shot and killed four innocent people that day , people whom he said were carrying weapons ....it has now been clarified that no such weapons were being carried by the innocent people shot dead that day ....so not only has this man committed murder but he has also committed perjury ...serious offences ....will these serious offences be brought before the courts or will the perpetrators of these serious crimes be allowed to go scot free . I also believe the brit soldiers who shot and killed people that day should be named ....not so people can attack/abuse them but to let the ordinary people see that british justice is open and outrages such as bloody sunday will not be covered up nor allow their soldiers to work with impunity .