How can someone look suspicious?

Someone may appear suspicious through unusual behavior, such as frequently looking around nervously, avoiding eye contact, or acting overly cautious in a situation where others are relaxed. Additionally, wearing inappropriate clothing for the environment, loitering without purpose, or having an overly large or concealed object can raise red flags. Engaging in secretive conversations or frequently checking their phone in a way that seems evasive can also contribute to a suspicious appearance. Overall, a combination of body language, attire, and situational context plays a significant role in how someone may be perceived as suspicious.