( CNN ) -- The wife of a man suspected of killing five people in Tennessee and one in Alabama was among the victims found in southern Tennessee , along with her son , father and brother , police said Sunday . Jacob Shaffer was arrested in connection with the slayings of six people in Tennessee , police said . Jacob Shaffer , 30 , of Fayetteville , Tennessee , was arrested Saturday after three people were found dead at a home in Fayetteville , 90 miles south of Nashville , Tennessee . Two other people were found at another home on the same street . The three found in one home were Shaffer 's wife , Traci Shaffer , 38 ; her son Devin Brooks , 16 ; and the youth 's friend and neighbor , 16-year-old Robert Berber , according to a statement Sunday from the Tennessee Bureau of Investigation . The two people found at the other home were Traci Shaffer 's father , Billy Hall , 57 , and her brother Chris Hall , 34 , authorities said . Autopsies were being conducted Sunday on the five , and causes of death would be released by medical examiners , the bureau said . A sixth person was found dead at a business about 30 miles away in Huntsville , Alabama , the Tennessee authorities said . The person 's name was not released Sunday . Jacob Shaffer was in one of the Fayetteville homes when Lincoln County sheriff 's deputies arrived Saturday , authorities said . Police believe the deaths happened either Friday night or Saturday , according to Kristin Helm of the Tennessee Bureau of Investigation . Officials said they believe the deaths were related to a domestic dispute . It was unclear when or how the Huntsville victim died . `` We have no clue yet as to what unfolded there and how it relates to here , '' Huntsville Police Sgt . Mickey Allen said Saturday . Without naming Shaffer , Allen said Tennessee authorities told him a man confessed to a slaying in Huntsville and to five other killings in Fayetteville . Shaffer faces five counts of criminal homicide in the Tennessee deaths , the TBI statement said . He was in the Lincoln County Jail without bond Sunday . CNN 's Mayra Cuevas-Nazario contributed to this report .
NEW : Suspect 's wife and her son , brother and father among the dead , police say . 30-year-old Jacob Shaffer was arrested Saturday , police said . Shaffer faces murder charges , Tennessee Bureau of Investigation says . Five bodies were found at two homes in Tennessee ; one victim in Alabama .