Ultimate Spider-Man #10 (2001)

Peter is captured by the Kingpin, and attacked by Electro, the Kingpin's personal thug. He is beaten, electrocuted, unmasked, and thrown out of a skyscraper. To make matters worse, when the Kingpin brings in Frederick Foswell to call him to the carpet over Spider-Man's intrusion, he puts the Spider-Man mask on Foswell before crushing the man's head with his bare hands. Spider-Man becomes a prime suspect in the murder.