In this compelling episode, we turn our focus to the second horrifying attack by the Zodiac Killer, an event that unfolded in the quiet darkness of Blue Rock Springs Park in Vallejo, California. On the night of July 4, 1969, what began as a typical Independence Day celebration ended in a nightmare when the Zodiac struck just minutes after midnight, targeting a young couple parked in a secluded lot. Through a detailed examination of the events, we'll explore the sequence of the attack, the killer's chilling phone call to the police confessing to the crime, and the subsequent letters that taunted authorities with encrypted messages. This episode delves deep into the investigation's challenges, the clues left behind, and the impact on the Vallejo community. Join us as we piece together the puzzle of the Zodiac's second known attack, shedding light on the darkness that enveloped Blue Rock Springs Park and forever changed the lives involved.