The Good Samaritan being hailed as a “hero” for firing upon Idaho In-N-Out gunman Chad Williams in the middle of his deadly drive-thru rampage had trained for such a moment for years after witnessing another mass shooting.

Jordan Salinas, 35, a healthcare worker and the full-time caregiver of his brother, who uses a wheelchair, had been horseback riding with his girlfriend the morning of the shooting when the couple pulled into the Twin Falls In-N-Out location for lunch and immediately noticed something amiss.

A large crowd of people was rushing through the exit doors of the restaurant, which he assumed was due to a kitchen fire until he heard…

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