Story highlights Officer was 50 years old, a 20-year veteran of the force

Police chief says this was a targeted killing

(CNN) San Antonio Police announced Monday the arrest of a man suspected of targeting and killing a 50-year-old police officer.

Otis Tyrone McKane, 31, was arrested around 4:30 p.m. while riding with a woman and a 2-year-old child in a car on Interstate 10, Chief William McManus said.

"This is the person's whose image we saw on surveillance," McManus said at a press conference. "This is also the person we believe is responsible for the cold and calculated murder of Detective Marconi."

Detective Benjamin Marconi, a 20-year veteran of the department, was shot to death while writing a traffic ticket outside of police headquarters Sunday.

Police have identified Otis Tyrone McKane as the suspect in the fatal shooting of SAPD detective Benjamin Marconi. https://t.co/9zo0AO3kZD pic.twitter.com/EKDKHyeQw8 — KPRC 2 Houston (@KPRC2) November 21, 2016

The department released footage of a man seen inside police headquarters four hours before the shooting and video of a car leaving the scene, CNN-affiliate KPRC reported. McManus, who said he believed Marconi was targeted because he was a police officer, told reporters that he doesn't believe McKane has any relationship to the driver pulled over before the shooting, CNN-affiliate KRIS reported

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