HOUSTON -

Local 2 Investigates has learned that a man arrested for capital murder is a prime suspect in at least three other robberies in Houston and Harris County, and that count could increase.

The prime suspect, Sergio Gil, 22, was arrested Sunday at an Academy Sports store in Harris County one day after a smoke shop clerk was robbed and shot to death at the F.M. 529 smoke shop. 

A friend, who asked to remain anonymous said the clear, Ziauddien Khan, 44, was a father of three.

Khan had asked for Monday off to take his oldest to college, the friend said. His children will now help plan their father's funeral.

Gil's arrest came less than 24 hours after the murder following a bizarre coincidence.

A source close to the investigation told Local 2, it appeared one day after the Khan's murder, Gil was shopping for more ammunition.

Gil was spotted, according to the source, at an Academy Sports store by someone who had previously been robbed by the teen.

Store security was notified and they contacted Harris County deputies.

Gil was arrested and charged with capital murder. Monday he was held without bond.