Deer island is a busy place. it's a popular spot for biking for jogging, and even for fishing. and there is also this big walterwaltter treatment facility here with a lot of people going in and out. >> i grew up here -- even if it is a kidnapped kid, you know what i mean. >> reporter: 3 1/2 feet tall weighing 30 pounds. investigators believe she is 4 years old. likely hispanic or caucasian. in this computer image she is wearing small gold earrings. so someone took the time to get her ears pierced. authorities don't have much to go on. but they did release pictures of some of the evidence. a ze...