PIKETON, Ohio (AP) — Authorities investigating the slayings of eight relatives in southern Ohio have taken a trailer linked to the family of one victim’s ex-boyfriend.

The trailer was taken from one of multiple sites that authorities searched late last week. Bernie Brown, who owns property in Peebles where the trailer had been stored, said its owners needed a place to keep household items after recently selling their Adams County farm.

Whatever significance the trailer might have hasn’t been publicly disclosed. The Pike County sheriff and the Ohio attorney general’s office won’t discuss details of any searches or other parts of the investigation into the April 2016 deaths of seven adults and one teenage boy from the Rhoden family.

They were found shot at four homes near Piketon, about 70 miles (113 kilometers) south of Columbus. Three children were found unharmed.

No arrests have been made, and family members have pleaded for anyone with information that might help solve the case to come forward.

Authorities have executed several dozen search warrants in the lengthy investigation. One of the most recent was issued in April and allowed investigators to put a tracking device on a truck driven by a brother of one of the victims, according to the Cincinnati Enquirer, which obtained a copy of the warrant.

The warrant indicated that investigators believe the truck was used in connection with an aggravated murder or by a person intending such a crime, but it doesn’t specify a connection to the Rhoden homicide investigation, and it doesn’t name the man as a suspect, the newspaper reported.

Leonard Manley, whose adult daughter and grandchildren were slain and who is related to the driver of the tracked truck, said he wants justice, but it seems to him that investigators are “grasping at straws.”

“It’s like a wound and then you pick at it,” he told the Enquirer, “and they are starting to pick pretty hard.”