Final answer:
Secondary spatter stains is not a recognized term in forensic science; it may be a misunderstanding of the term secondary transfer stains in bloodstain pattern analysis or may be confused with the environmental science term 'secondary pollutant'.
Step-by-step explanation:
Secondary spatter stains are not a commonly used term in forensics; typically, the term secondary spatter isn't used. Instead, you may be referring to secondary transfer stains in bloodstain pattern analysis. These are stains created when an object with blood on it contacts a surface that did not have blood on it already. Since this doesn't correlate with the provided definition of a secondary pollutant, which is a contaminant in the environment that forms when primary pollutants react after being released into the environment, it seems there might be some confusion between environmental science terminology and forensic science.