Washington (AFP) - Violent protests in Baltimore yielded to calm Sunday, as mourners readied a funeral wake for Freddie Gray, an African American man who died of injuries sustained while in police custody.Gray, 25, who died one week ago after his spine was nearly severed following his arrest, was to be buried Monday in his hometown of Baltimore, less than an hour from the US capital Washington.A viewing of his body for friends and family was to be held at a local Baltimore funeral home beginning at 1:00 pm (1700 GMT) Sunday.One day earlier, protesters rampaged through downtown Baltimore, in the latest show of public rage after the death of an unarmed African American by US law enforcement.Speaking to US television, Congressman Elijah Cummings, who represents the Baltimore district where the violence took place, said he was pleased that the US Justice Department was undertaking a "top to bottom" probe of the city's police department."We've got to take this department apart and try to figure out what is wrong and what is right," Cummings told CBS television's "Face the Nation" program."This is a significant moment," Cummings said.