Authorities investigating the slayings of eight members of one family in southern Ohio are asking nearby residents and businesses to share any video they have that might be relevant to the case.

Seven adults and a 16-year-old boy were found shot April 22 at four homes near Piketon.

Ohio Attorney General Mike DeWine and Pike County Sheriff Charles Reader on Tuesday asked that anyone who recorded video nearby on April 21 or 22 to contact their offices. The request includes, but isn't limited to, any video from the night of April 21 or the morning of April 22 that shows vehicle movements in the area, DeWine said. Investigators said they already have some video that was brought forward.

Speaking Tuesday in Cincinnati, DeWine called the request "an attempt to get anything that has been missed," The Cincinnati Enquirer reported.

Investigators also ask that anyone with information that might help solve the shootings call the state Bureau of Criminal Investigation tip line at 1-855-BCI-OHIO.

Investigators say they've received more than 500 tips and done over 130 interviews as they try to determine who targeted the Rhoden family and why.

A coroner said all but one of the victims were shot more than once.

The discovery of marijuana growing operations at three of the four crime scenes stoked rumors that the slayings were related to drugs, but that's only one of many theories about possible motives that have circulated.

The victims were identified as 40-year-old Christopher Rhoden; his ex-wife, 37-year-old Dana Rhoden; their three children, 20-year-old Clarence "Frankie" Rhoden, 16-year-old Christopher Jr., and 19-year-old Hanna; Frankie Rhoden's fiancée, 20-year-old Hannah Gilley; Christopher Rhoden Sr.'s brother, 44-year-old Kenneth Rhoden; and a cousin, 38-year-old Gary Rhoden. Hanna Rhoden's days-old baby girl, another baby and a young child were unharmed.