Updated

The Latest on an officer shot in northwest Mississippi (all times local):

2:45 p.m.

Authorities in northwest Mississippi say police are questioning a man believed to have shot a Clarksdale police officer point-blank in the face.

Clarksdale Mayor Bill Luckett says police found "telling evidence" at the family's home early Sunday, and the man's father brought him to the police station Sunday afternoon.

Luckett says video shows that Cpl. Derrick Couch got out of his patrol car, apparently to question the man, who pulled a pistol and shot him late Saturday. He says Couch is on a ventilator, has lost one eye, and the bullet remains lodged in his brain.

He says the shooting occurred about four blocks from a convenience store that had just been robbed. Luckett says the store and City Hall are at opposite ends of the same block, facing different directions.

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11:59 a.m.

Authorities in northwest Mississippi say an officer is in critical condition after being shot in the head while investigating a robbery across the street from a police station.

Nursing supervisor Vivian Crawford said Sunday that Derrick Couch is in critical condition at Regional One Health in Memphis.

Mayor Bill Luckett tells WMC-TV (http://bit.ly/20TnatX ) that Cpl. Couch was found on the street outside a convenience store that had been robbed late Saturday by two masked men. The report said the store is across from a police station.

WREG-TV (http://bit.ly/1TgYJR4 ) reports that police have released a video of two possible suspects, including one with a noticeable limp.

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This story has been corrected to show that Derrick Couch is a corporal, not an officer.