Peter Pettigrew first mention

'Pettigrew died a hero's death. Eye-witnesses - Muggles, of course, we wiped their memories later - told us how Pettigrew cornered Black. They say he was sobbing. "Lily and James, Sirius! How could you!" And then he went for his wand. Well, of course, Black was quicker. Blew Pettigrew to smithereens...'
'I was one of the first on the scene after Black murdered all those people. A crater in the middle of the street, so deep it had cracked the sewer below. Bodies everywhere. Muggles screaming. And Black standing there laughing, with what was left of Pettigrew in front of him... a heap of blood-stained robes and a few -  a few fragments -'

Pg 220 - THE MARAUDER'S MAP