Parents fear for young daughter's safety as her behavior changes dramatically: 20/20 Jul 20 Part 1

A man ran out of money when he decided to travel 1,500 miles to adopt a dog. Sadie, a collie-husky mix. Joel Carpenter couldn't resist spending his last dime on her. The only problem, he had no money left to get home. The 23-year-old fell for Sadi...