Police officer 's mother : ' I am deeply sorry ' Her son was ' completely out of control , ' she told a CNN reporter . The family vows to stand by officers ' families in ` ` unspeakable pain '' following `` a very troubled childhood . '' Investigators probe how he got the gun he used .
Police officer 's mother : ' I am deeply sorry ' Her son was ' completely out of control , ' she told a CNN reporter . The family vows to stand by officers ' families in ` ` unspeakable pain '' Investigators probe how he got the gun he used .