So, as a former cop, this phone call trick worked every time. If you're being investigated by the police and you're in an interrogation room, if the police leave a phone in there and say, "Why don't you just call your grandmother? She's probably worried about you." Don't fall for it. When you pick up that phone and call anybody, all of that will be recorded and it'll be used against you. Sometimes we would leave them alone in there with a phone without telling them to call anybody. If the police walk out of the room, you might think you're not being listened to anymore. You might think it's okay to use the phone that they left behind purposely for you to