The Amazing Spider-Man #542

Synopsis

Kingpin is waltzing out of jail, when Spider-Man shows up for a final confrontation about the shooting of Aunt May. After going a few rounds in front of an audience of inmates, Spider-Man takes off his mask and tells Kingpin that, whereas Spider-Man would never kill the villain, Peter Parker is ready and willing to do just that. Peter beats the Kingpin to within an inch of his life and tells him that he is going to have to live with the shame of being beaten in front of those he claims to rule but only as long as Aunt May lives because, once she dies, Peter will be back to finish the job.