Last November, Oklahoma City police officers went to check on an elderly woman after relatives reported they hadn't heard from her in a while.

At 77, Janet Hume was living with her adult son, Gerald, who the family said was schizophrenic. Since she typically kept in close contact with relatives, police decided to investigate.

They visited the Hume home on three occasions. Each time, her son refused to let them inside, insisting "everything was OK," according to a police affidavit.

But it was far from it.

Read more: http://www.cnn.com/2013/01/30/health/mental-illness-guns/index.html