(Portland, OR)  --  Police are investigating an officer-involved shooting that wounded a man who threatened to kill himself.  Authorities say the 56-year-old man was shot around 7:15 last night during a confrontation after he got out of his car in the 33-hundred block of Southeast 22nd Avenue.  The man is listed in critical condition.  No police officers were injured.  The Portland Police Bureau says they'll release the identity of the man later today.