Is there a case on search of multiple vehicles during stop? My facts are the suspect vehicle flashed lights when officer initiated stop, then the second vehicle voluntarily pulled over. A handgun and marijuana found in suspect vehicle, both vehicles' passengers searched. A passenger in second vehicle had mj in her purse and bra.

Was there consent to search the second car or what was the PC? I guess that would be my focus. Why is it important to get cases on multiple car searches?