Reader added: 'This was very methodical. This was well planned. This was not something that just happened.'
The eight victims were Christopher Rhoden Sr, 40, 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.
Reader said it was evident that it was only members of the family who were targeted and the general public were not likely to be threatened.
He added: 'I’m a member of that community, it’s very emotional to find out that 8 people in your community have been murdered.'
Eighteen pieces of evidence were being examined for DNA clues, DeWine said, but he would not reveal what they were.
Police also refused to reveal what type of gun or bullets were used and whether they had identified a suspect.
Authorities have been scrambling to determine who targeted the clan and why. Investigators have interviewed between 50 and 60 people in hopes of finding leads, and a team 38 people is combing wooded areas around the shooting scenes to ensure no evidence was missed, Reader said.
Five search warrants have been issued and seven of the eight autopsies have been completed.
Police are also looking at claims by Rhoden family members that twenty-year-old Frankie Rhoden felt threatened by rivals jealous of his $3000 demolition derby car which he used to enter competitions, as first revealed by Daily Mail Online.
More than 100 members of the Rhoden family, some of whom live in rundown houses and trailers dotted around the area were advised to ‘arm themselves’ by Reader for their own safety.
Ohio shootings lead prosecutors to investigate Facebook threat to Christopher Rhoden Jr | Daily Mail Online