Shawn Kemp allegedly wasn't the only one pulling the trigger during his parking lot altercation on Wednesday ... police responded to "two subjects firing shots at each other," according to dispatch audio obtained by TMZ Sports.
53-year-old Kemp was arrested for drive-by shooting following a dispute with another driver outside a Tacoma, WA shopping mall on Wednesday ... after cops say an altercation broke out between two cars around 2 PM.
BEFORE THE ARREST
As we previously reported, witnesses claim they heard gunshots prior to recording part of the incident on their phones .