PIKE COUNTY, Ohio --A Facebook threat mentioning one of the eight members of an Ohio family who were shot and killed execution-style on Friday is among the the evidence investigators are examining, CBS News has confirmed. 
 
 The threat specifically called out Christopher Rhoden Jr., who died along with seven other members of the Rhoden family, in a string of shootings at four rural locations. 
 
 "I'm aware of the Facebook threat," Ohio Attorney General Mike DeWine told CBS News. "Every piece of information is valuable and our investigators are certainly taking that into consideration." 
 
 Pike County Sheriff Charles Reader, said most of the victims were targeted while they were sleeping. He said it was clear the family was targeted and that he has warned the surviving members of the Rhoden family to take precautions and arm themselves. 
 
 "I cautioned them, told them we will be there," Reader told CBS News. "I told (them) to be armed." 
 
 One member of the family, who asked not to be identified, said the relatives are "torn up" over the murders. 
 
 "And you know what I mean, kinda freaked out because we don't know. There's still killers on the loose, or killer," he said. 
 
 Authorities confirmed Sunday that marijuana grow operations were found near some of the sites where the Rhoden family members were murdered. 
 
 A law enforcement source has confirmed that investigators found some 200 marijuana plants in the executed Ohio family's indoor grow operation, CBS News senior investigative producer Pat Milton reports. 
 
 The source said the size of operation indicates it was being grown for sale not for personal use. 
 
 Each plant could produce about one pound of marijuana. A pound of high-grade quality marijuana has a street value of about $2,000. 
 
 A second law enforcement source said that investigators are looking at numerous avenues as a motive for the killings among them is whether there is a Mexican drug cartel connection or a possible drug turf war or family feud. 
 
 The Friday killings at four different homes near Piketon, Ohio, was "a sophisticated operation," DeWine said at a news conference in the small community that has been on edge since the seven adults and one teenage boy were found shot in the head. 
 
 DeWine cautioned it was too soon to determine if the marijuana grow operations and the murders were directly connected. 
 
 At the Dogwood Festival in downtown Piketon on Sunday afternoon, the crowd was smaller than usual. Courtney Boyer came with her infant daughter. 
 
 "People are scared to come out," she said. "What if that person who shot all those people is running around here. You don't know who it is. Or what they're capable of doing?" 
 
 Authorities have been scrambling to determine who targeted the clan and why. Investigators have interviewed more than 30 people in hopes of finding leads in the deaths. 
 
 The victims were identified Saturday as 40-year-old Christopher Rhoden Sr.; his 16-year-old son, Christopher Rhoden Jr.; 44-year-old Kenneth Rhoden; 38-year-old Gary Rhoden; 37-year-old Dana Rhoden; 20-year-old Clarence "Frankie" Rhoden; 20-year-old Hannah Gilley; and 19-year-old Hanna Rhoden. 
 
 It appeared some of the family members were killed as they slept, including Hanna Rhoden, who was in bed with her newborn baby nearby, authorities said. The infant was 4- or 5-days old. The baby, Hannah Gilley's 6-month-old baby, and 1 other small child were not hurt. 
 
 Since the slayings, authorities have refused to discuss many details of the crime, including any evidence or the search for the assailant or assailants. 
 
 Investigators sought tips and gave people a number to call if they had any details about the crimes. A Cincinnati-area businessman also put up a $25,000 reward for information leading to the capture and conviction of the killer or killers. 
 
 Two of the crime scenes are within walking distance of each other along a sparsely populated, winding road that leads into wooded hills from a rural highway. 
 
 The third residence is more than a mile away, and the fourth home is on a different road, at least a 10-minute drive away, said the investigation's leader, Benjamin Suver, a special agent in charge with Bureau of Criminal Investigations. 
 
 An out-of-breath caller who found two of the eight family members told a 911 dispatcher in a quavering voice that "there's blood all over the house." 
 
 "I think my brother-in-law's dead," she said, her voice rising as she adds later that it looks like someone has "beat the crap out of them." 
 
 "I think they're both dead," she said before breaking down into sobs, according to one of two 911 call recordings released Saturday by the state attorney general's office. 
 
 Phil Fulton, the pastor of Union Hill Church up the road from where some of the victims were found, described the family as close-knit and hardworking. He said they were previously part of his congregation, though not recently. 
 
 "We're just doing everything we can to reach out to the family to show them love and comfort," Fulton said. 
 
 Kendra Jordan, 20, said she often worked nights at a nursing home with the mother of the newborn and described her as outgoing, funny and always smiling. 
 
 "If you were having a bad day, she'd be the first one to come up to you to question you about what was going on," Jordan said. "She was amazing." 
 
 Jordan said the town would have difficulty recovering from the loss of a such a well-known family in the tight-knit community. 
 
 "Everyone knows that family, you can't not know that family," she said. "They're involved in everything, and they're at every event that's going on in town. Just about see them anywhere you went." ||||| Lt. Michael Preston, of the Ross County Sheriff's Department speaks to the media on Union Hill Road that approaches a crime scene, Friday, April 22, 2016, in Pike County, Ohio. Shootings with multiple... (Associated Press) 
 
 PIKETON, Ohio (AP) — The Latest on the slayings of eight members of a southern Ohio family (all times local): 
 
 5:30 p.m. 
 
 Authorities say they found marijuana-growing operations at three of the four locations where eight family members in rural southern Ohio were found fatally shot. 
 
 They said at a news conference Sunday that it's unclear what, if any, role the growing operations had in Friday's killings. Seven adults and a teenage boy, all Rhoden family members, were found shot in the head at homes near Piketon, about 60 miles south of Columbus. 
 
 Attorney General Mike DeWine called the slayings a "pre-planned execution." 
 
 DeWine and Pike County Sheriff Charles Reader would not comment on a possible motive, but said the investigation will be lengthy. More than 100 personnel are assisting in the investigation. 
 
 Autopsies on the bodies are expected to be completed Monday. 
 
 ____ 
 
 5 p.m. 
 
 The state attorney general has called the slayings of eight family members in rural Ohio a "pre-planned execution." 
 
 Mike DeWine said in a news conference late Sunday afternoon that the attorney general's office don't know if there is one or more suspects but that the investigation into who killed the Rhoden family, and why, will be lengthy. 
 
 DeWine called the killings a "sophisticated operation." 
 
 More than 100 personnel in the southern county of Pike are assisting in the investigation. 
 
 Seven adults and a teenage boy were found fatally shot Friday at four different properties near Piketon, about 60 miles south of Columbus. Autopsies are being performed this weekend. Authorities said investigations at the crime scenes are complete but will remain closed. 
 
 ___ 
 
 3 p.m. 
 
 A cook at a restaurant in rural southern Ohio says many people in the community remain on edge after the slayings of eight family members. 
 
 Maggie Owens says her son was friends with one of the victims, 16-year-old Christopher Rhoden Jr. Owens says she also knew 37-year-old Dana Rhoden, who she described in a phone interview on Sunday as having "a heart of gold." 
 
 The two victims and six others were found fatally shot Friday at four different properties near Piketon, about 60 miles south of Columbus. Authorities were still trying Sunday to find out who targeted the Rhoden family and why. 
 
 Attorney General Mike DeWine and Pike County Sheriff Charles Reader called for a 4:30 news conference Sunday to give an update into the investigation. 
 
 ___ 
 
 12:10 p.m. 
 
 A spokeswoman for Ohio's attorney general says authorities have yet to release the four locations where eight family members were slain in rural Ohio, though evidence collection has been completed. 
 
 Spokeswoman Jill Del Greco said Sunday that investigators want to keep the scenes preserved until all the autopsies have been completed and possibly longer than that. 
 
 Seven adults and a teenage boy were found fatally shot Friday at four different properties near Piketon, about 60 miles south of Columbus. Authorities were still trying Sunday to find out who targeted the Rhoden family and why. 
 
 The victims' bodies are at the Hamilton County coroner's office, where autopsies are expected to take the weekend. 
 
 Del Greco says investigators want to keep the scenes preserved in case they need to review them again. 
 
 ___ 
 
 11:20 a.m. 
 
 Gov. John Kasich (KAY-sik) is calling the slaying of eight family members in rural southern Ohio "a horrible set of murders." 
 
 Seven adults and a teenage boy were found fatally shot Friday at four different properties near Piketon, about 60 miles south of Columbus. Authorities were still trying Sunday to find out who targeted the Rhoden family and why. 
 
 Kasich says he's been getting updates on the case as he is campaigning out of state for the Republican presidential nomination. 
 
 The governor told CBS in an interview Saturday that he is confident the perpetrators would be found and "justice will be delivered to them." 
 
 Attorney General Mike DeWine's office said Saturday that work at each of the crime scenes has been completed, and investigators are pursuing leads and processing evidence. 
 
 ___ 
 
 3:10 a.m. 
 
 Residents of the rural southern Ohio community of Piketon are rattled by a rare major crime that took the lives of eight members of a tight-knit family known as hard workers. 
 
 Authorities were still trying Sunday to find out who targeted the seven adults and teenage boy and why. Their bodies were found Friday at four different homes near Piketon, about 60 miles south of Columbus. 
 
 Kayla Hay says she's a former co-worker of one of the victims. She says she never heard 37-year-old Dana Rhoden say anything about being frightened or concerned about anything bad happening. 
 
 Outdoors shop owner Todd Beekman says at least one customer has come in to stock up on ammunition after hearing about the shootings. 
 
 Investigators say they've questioned more than 30 people.
– A new development in Ohio: One of the eight family members killed in a horrific mass slaying had already been threatened on Facebook, CBS News reports. The threat was directed at Christopher Rhoden Jr., who at 16 was the youngest of the victims. "I'm aware of the Facebook threat," says Ohio Attorney General Mike DeWine. "Every piece of information is valuable and our investigators are certainly taking that into consideration." Now Pike County Sheriff Charles Reader has told surviving Rhoden family members to be careful. "I cautioned them, told them we will be there," Reader says. "I told [them] to be armed." One surviving family member says the Rhodens are "torn up" about the killings. "And you know what I mean, kinda freaked out because we don't know," says the relative, who asked not to be identified. "There's still killers on the loose, or killer." The slayings happened in four rural homes near Piketon, Ohio, a town of about 2,200 where the Dogwood Festival on Sunday had a smaller-then-usual turnout. "People are scared to come out," says a resident. "What if that person who shot all those people is running around here." Now autopsies of all eight victims have been completed, News Net 5 reports, and a chart of the Rhoden family relationships can be seen here. (Marijuana-growing was found at three of the four murder sites.)