Question: Assume you are a border patrol agent assigned to a city located near the Arizona-Mexico border. One day, you see a truck loaded with people who, from your experience, look like they just arrived after crossing the Mexican border, which is located only 20 miles away. (In other words, based on their clothing, hairstyles, and mannerisms, they do not look like American residents.) You stop the vehicle and begin asking questions. However, you cannot get a coherent answer because none of the vehicle's occupants speak English (and you don't speak Spanish). You take the occupants of the vehicle into custody because you suspect, based on the totality of circumstances, that they are illegal immigrants who just crossed the border. Was the arrest valid? Explain.