SAN ANTONIO - Months after a deadly shooting, police make an arrest and social media played a role.

Investigators said the victim's relative found Facebook messages between the victim and 18-year-old Wyatt Rushing.

According to his arrest warrant, Rushing shot and killed 17-year-old Michael Moriarty on December 18.

A jogger found Moriarty lying face down on Devine Road with several gunshot wounds.

Police said a relative of the victim checked his Facebook messages and saw that met up with a childhood friend the night he was killed. That friend was Rushing.

Police were able to track him down and arrested Rushing Monday night.