Quote from Adrian Monk in Mr. Monk and the Panic Room
Adrian Monk: That is strange. Captain Stottlemeyer: What's strange? Adrian Monk: These footprints heading toward the house, you see the whole foot. He's walking. Captain Stottlemeyer: So? Adrian Monk: Look at these heading the other way. You see the whole foot. Still walking. If somebody tripped an alarm, especially a kid, you'd think they'd run away. Captain Stottlemeyer: You might be right, but it doesn't matter, because whoever broke that glass never got into the house. He's not the killer.