A suspect has been arrested in the fatal weekend shooting of a San Antonio police detective.

San Antonio Police Chief William McManus said Monday evening that 31-year-old Otis Tyrone McKane was arrested without incident in the Sunday night killing of Detective Benjamin Marconi. He was arrested around 4:30 p.m. Monday after the car he was driving was stopped on Interstate 10.

McManus had said previously that dashcam video from Marconi's patrol vehicle provided "a lot of information" for investigators about his death.

Benjamin Marconi was killed while sitting in his patrol car.

Marconi was shot as as he sat in his vehicle after making a traffic stop. Authorities have said a gunman walked up to Marconi's driver's-side window and fired.

Marconi was writing a ticket for a motorist at the time. Investigators have said that driver was not connected to the shooter.

The investigation continues, and despite the arrest, McManus said that doesn't change the fact that there remain some who would target police officers with violence. Therefore, he said San Antonio officers remain "vigilant and on guard."

Marconi's family issued a statement Monday giving "thanks from the bottom of our hearts" for the outpouring of support after the officer's death.

Family members are asking for privacy to mourn.