We were first introduced to Damon Ryder in Amazing Spider-Man Annual #36.
In the present, Ryder attacked Peter as the Raptor, thinking Peter was really Ben and blaming him for his family's death.
We see more of Ben and Damon's history in #608...
In the present, Damon confronts Peter at the offices of Front Line. Peter manages to put a spider-tracer on his jacket, which leads him to an abandoned warehouse where he gets attacked by Kaine. Meanwhile, Damon pays a visit to Peter's roommate Michelle.