Story highlights "Long-simmering domestic dispute" turned deadly, GBI says

Daughter, 16, called police after dad killed mom, according to police

The alleged shooter was later found dead after shootout, investigator says

(CNN) A former cop "disenfranchised with law enforcement" and known to own "a lot of guns" is accused of killing his ex-wife before ambushing a sheriff and deputy who responded to the scene, a Georgia Bureau of Investigation official said Monday.

The deaths appear to have resulted from a "long-simmering domestic dispute," Rusty Andrews, the Georgia Bureau of Investigation's deputy director of investigations, told reporters.

Anthony Giaquinta, an ex-military contractor and a former law enforcement officer with the Gainesville Police Department and Habersham County Sheriff's Office, was found dead from what police believe was an exchange of gunfire with a deputy.

Giaquinta's 16-year-old daughter and her boyfriend were at the house outside Clarkesville when Giaquinta arrived and produced a gun. She heard gunshots, saw her mom dead, called 911 and fled, Andrews told reporters.

Habersham County Sheriff Joey Terrell, Deputy Bill Zigan and a second unnamed deputy responded to the scene and found Kathy Giaquinta Smith dead in the garage, Andrews said.

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