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The murders of Valentina Suriani and Salvatore Lupo marked a major turning point in the Son of Sam case. This attack drew intense media attention and led to the discovery of the first confirmed letter from the killer. The presence of written communication transformed the investigation and escalated public fear across New York City.
Berkowitz approached the parked car and fired multiple shots through the window, killing both victims instantly. A letter addressed to police was left nearby, marking a significant escalation in behavior.
The letter introduced the name “Son of Sam” and included taunting language directed at law enforcement. This became a critical piece of evidence and shifted the investigation into a high-profile manhunt.