Final answer:
The complaint would fall under the Fourth Amendment, as it protects individuals from illegal searches and seizure of their property. If the personal vehicle was searched without a warrant or probable cause, the individual has grounds to file a complaint.
Step-by-step explanation:
The complaint would fall under the Fourth Amendment of the United States Constitution.
The Fourth Amendment protects individuals from illegal searches and seizure of their property, including their personal vehicles. It ensures that government officials, including organizations, must obtain a search warrant based on probable cause before conducting a search.
In the given scenario, if the individual's personal vehicle was searched without a warrant or probable cause, they would have grounds to file a complaint under the Fourth Amendment.