In US v. Jackson, what evidence caused officers to suspect the defendant of carrying drugs?

The evidence that caused officers to suspect the defendant of carrying drugs in the case of US v. Jackson was primarily derived from the defendant's nervous and erratic behavior. This type of behavior is often indicative of the presence of illegal substances, as individuals who are involved in drug transportation can display signs of anxiety, restlessness, or inconsistency in their demeanor when confronted by law enforcement. Officers are trained to observe these behaviors, which can serve as a critical basis for reasonable suspicion and further investigation.

Understanding the context shows that while other factors, such as a dog's alert or conflicting statements from a driver, can contribute to suspicion, the direct connection between nervous behavior and drug concealment is particularly compelling. Nervousness can signal that an individual has something to hide, making it a key piece of evidence in determining the likelihood of drug possession or trafficking.