Detailed text transcripts for TV channel - MSNBC - 20171217:08:05:00
>> reporter: we instructed our actor to be friendly, establish a rapport. he praises sam's artwork. >> this is terrific, man. >> thanks. >> reporter: then, a few days later, sam's mom tells him she is going out to run errands. >> love you. okay. love you, too. >> reporter: she leaves him alone in the house, but she really joins me in the watch mobile, parked right around the corner. >> you can tell i'm nervous. >> reporter: nervous she hasn't made it clear to her son that just because he has melt someone before doesn't mean he should open the door when he is home alone.
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