South Korean actor-singer Ryu Si-won has been indicted on charges of secretly planting a GPS tracking device on his estranged wife’s car, prosecutors said Wednesday.

The 41-year-old actor is accused of tracking his wife’s GPS location for about eight months starting from May 2011, they said, adding that he allegedly installed a tracking app on her phone.

The actor is also under suspicion of slapping his wife in the face several times when she asked about his alleged behavior, prosecutors said.

The 32-year-old wife, only known by her surname Cho, sued Ryu in February while the two were going through divorce proceedings, claiming that the actor had threatened her. The wife filed for divorce last year and the couple is currently undergoing trial. (Yonhap News)