A man suspected of shooting and killing eight people in suburban Chicago this weekend was related to most of the victims, authorities said Tuesday, a day after the 23-year-old fatally shot himself during a confrontation with law enforcement in Texas. Joliet Police and the Will County Sheriff’s Office say investigators believe Romeo Nance shot seven people — most of whom were relatives — at two homes in Joliet on Sunday before randomly shooting two men at other nearby locations. One of those men survived. The Illinois authorities said there is no evidence to provide a motive for the killings at this point.