Homicide suspect of slain Mesa HS teacher arrested in Northern CA By FOX 10 Web Staff Published January 23, 2017 6:36am EST FOX 5 Atlanta Loading Video… This browser does not support the Video element. Caleb Bartels, 27, was arrested for the murder of Ryne Zahner, a Mesa High School teacher. Caleb Bartels Caleb Bartels Caleb Bartels - Tempe Police Dept. homicide suspect poster