( CNN ) The picture says it all : a black eye . Cuts and scrapes all over his face . A swollen lip . Police say the mugshot was taken after William Mattson was accused of sexually assaulting a woman . The police department in Conway , South Carolina , posted the photo on its Facebook page along with an explanation that its officers had gone to a residence about 1 a.m. Thursday after reports of a sexual assault . They found 52-year-old Mattson in the condition seen in the photo . According to police , the injuries were inflicted `` by someone acting in defense ( of ) the victim . '' Conway Police charged Mattson with first-degree criminal sexual conduct . He is being held at the J. Reuben Long Detention Center in that city , just inland from Myrtle Beach .
William Mattson is charged with criminal sexual conduct in Conway , South Carolina . Police : Someone acting in defense of the alleged victim injured him before officers arrived .