I forgot the name of this movie, can someone tell me?

I was watching this movie on directv and I can't remember the name of
it, I never got to finish it. Ok what happened in the movie was that
there was a man who spent like 10 minutes looking at himself in the
mirror weilding a revovler, and then he put the gun in his pants loop
and walked out, and I think the movie said that it was 1973 England,
but the kid was in the I think VDF England, but anyway he went to
another boys house afterwards and picked him up, and while this was
going on these other 2 boys where trying to get into peoples cars, and
then they got into an old muscle car, hotwired it, and picked the boy
with the revovler and his friend up, and they parked somewhere and
talked about they're first kill on some guy with the last name
Griffin, I think it was Jimmy Griffin, but I doubt that was his first
name, and then they went to his house and shot Griffin, through his
window, 3 times in the head, and right in front of Griffins little
brother who was kicking a soccer ball outside against the side of the
concrete house over and over, and then the guy looked at the little
brother and ran back into the muscle car and they drove off and went
to a party after burning the car. And the little brothers mom blamed
him for 33 years that it was his fault his brother died because he
didn't stop the guy from killing his brother. And then 33 years after
they killed him. The little brother and the man who killed him(after
serving prision time for the murder) went to a castle for an interview
for a TV segment about what happened that night. But the little
brother(now a 40 year old man) planned on killing him for what he did
to him and for killing his brother....thats all I saw....