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Patrick Semansky, Associated Press
Investigators walk at the scene of a shooting at a shopping center in Abingdon, Md., Wednesday, Feb. 10, 2016. A man opened fire inside a shopping center restaurant during lunchtime.

ABINGDON, Md. — The son of a gunman who fatally shot two Maryland sheriff's deputies before he was killed in a shootout says his father was a heavy drinker with emotional problems, but never spoke poorly of police.

Jeremy Evans told WBAL-TV he believes his father, 68-year-old David Brian Evans, thought he'd spend the rest of his life behind bars and decided to get away.

Sheriff Jeffrey Gahler says David Evans, who had warrants for his arrest, fatally shot a deputy in a restaurant Wednesday and killed another deputy in shootout nearby before he was killed himself.

Jeremy Evans says his mother alerted authorities and left the restaurant where the first shooting occurred before a deputy arrived. He said David Evans shot his mother 20 years ago and she believed he was there to hurt her Wednesday.