One of the four groops follwing cyrus' trail saw the groop by the river bank he desided to check the other scents. Two were a matach (sean and cyrus)you they called reinforce ments and since tow of them were a hit will came personaly. Another found the man hole that roxas whent in to they deised to seal all posible entry ways and exsits in the sewer and stationed a gard at ever posible opening and another to watch the camras inside the swer.