our thanks to cnn's patrick snell. >>> we're going to move on now to other news. in philadelphia, police have made a horrifying discovery. you're not going to believe this one. four mentally challenged adults locked and chained in the basement of an apartment building. the three men and one woman are believed to have been there for a week. three people are in customer -- are in custody. they're accused of holding the captives to get their social security checks. susan candiotti reports. >> reporter: don, it's almost too awful to think about what happened to four adults inside this apartment building. it was simply put a room of horrors. police call it an act of evil. in a basement below the basement of this philadelphia house, a chain shackled one of four mentally and physically challenged adults to a boiler, all of them locked behind a steel door. one woman and three men age 29 to 41. >> it looks like a dunkon. these people were stored like surplus meat in the basement. >> reporter: held captive in a 15 x 15 foot room, emaciated and covered in bed sores and filth