This law was established by The Supreme Court in 1967.
This prevents and protects officers from being petitioned for non compulsory actions during the course of duty unless their activities breached federal law or constitutional rights.
In Chapter 10, Smith talks about a Puerto Rican named Pete who owned and operated a bodega across the street from the firehouse. Smith characterizes Pete as a typical Puerto Rican: lazy, with no ambition to succeed in the United States.