STAMFORD, Conn. — The woman shot to death after a police chase
from the White House to Capitol Hill had been suffering mental
health problems, federal law enforcement officials said,
including postpartum depression after her daughter was born and
a troubling fixation on President Obama.  That portrait began to
emerge Friday as police in Washington launched investigations to
determine why Miriam Carey, 34, of Stamford, Conn., drove
erratically around the White House and Capitol Hill with her
18-month-old daughter in the back seat and whether police
responded appropriately by shooting her after she repeatedly
refused to stop.  Carey's declining mental stability, the
sources said, developed into a belief that the president was
controlling her life, which may explain why she appeared
Thursday afternoon next to the White House and then led Secret
Service agents and Washington police on a two-mile, three-minute
chase down Pennsylvania Avenue. Along the way, two officers were
injured.  "She thought that the presiden