Three men have been arrested in Cincinnati and are being charged in connection with what Oakland County Sheriff Michael Bouchard called Wednesday the "execution" of a Pontiac businessman during an alleged armed robbery at a marijuana business.

The Oakland County Sheriff's Office is investigating after a 66-year-old businessman was shot and killed earlier this week.

PONTIAC, MI – Officials are investigating after a 66-year-old businessman was shot and killed in Oakland County. According to WXYZ-TV in Detroit, the Oakland County Sheriff’s Office responded to a business in the 1000 block of University Drive in Pontiac at 8 p.m. on Monday.

Sam Simko, 66, of Commerce Township, was found dead at about 8:15 p.m. Monday in his business building in the 1000 block of University Drive in Pontiac