The moment my 12-year-old son ran out the front door, I locked it. The temperature that evening was 17 degrees. Bob was wearing basketball shorts, a tank top and no shoes. Earlier he was playing with knives and making threats. My mind struggled as he banged on the door begging me to let him in. Finally, I unlocked the back door to the basement and told him to go around the house. He slept downstairs (behind a locked door) while my family slept safely upstairs. The next day Bob was diagnosed with bipolar disorder.