The Ohio attorney general says whoever killed eight members from the same family in Ohio were familiar with the victims, their homes and the surrounding area.

Attorney General Mike DeWine has also told the Cincinnati Enquirer that the FBI, U.S. Drug Enforcement Administration and U.S. Department of Homeland Security have worked with the Ohio Bureau of Criminal Investigation and other agencies on what's become a monthslong investigation.

Eight members of the Rhoden family were found shot to death in four Pike County homes in April. No one has been arrested for the slayings.

DeWine told the newspaper that people living in the area know more than what they've told investigators.

The Pike County sheriff has said more than one person was involved in killing the family.