What is a sign of drug-related behavior in a suspicious vehicle?

When considering signs of drug-related behavior in a suspicious vehicle, windows being open during cold weather can indicate attempts to ventilate the vehicle. This behavior suggests the presence of drug use, as individuals might want to dissipate odors associated with substances like marijuana or other drugs. Keeping windows open could also indicate a driver trying to mask the smell of drugs or ensure air circulation in scenarios where they might be concerned about being detected by law enforcement.

In contrast, high-speed driving typically points to reckless driving or the possibility of evasiveness but doesn't specifically indicate drug use. Using turn signals is a sign of good driving behavior and compliance with traffic laws, not necessarily linked to any suspicious activity related to drug use. Frequent stopping at intersections might suggest uncertainty or erratic driving patterns, which can occur for various non-drug-related reasons, making it less conclusive as a sign of drug-related behavior. Therefore, the action of having windows open in cold weather stands out as a strong indicator of potential drug-related behavior.