CLEVELAND, Ohio – Investigators have not identified any suspects in the double slaying that happened earlier this month near the bank of the river in the Rocky River Reservation.

The FBI and Metroparks police held a press conference Monday to renew their pleas for help in answering many lingering questions about Carnell Sledge and Katherine Brown, whose bodies were discovered June 4 in the popular outdoor destination.

Metroparks Police Chief Katherine Dolan and Cleveland FBI Special Agent in Charge Eric Smith detailed that investigators narrowed down what time Sledge and Brown entered the park. They arrived at a parking lot located just north of the Lorain Road bridge about 5:04 p.m. They came in separate vehicles and took a seat on a park bench.

Investigators believe they were shot to death sometime between 5:08 p.m. and 5:15 p.m.

Dolan and Smith declined to say how investigators managed to reach those conclusions. However, investigators are convinced that somebody saw something, noting that the area known as the “pull-off lot” located north of the bridge is often busy on sunny, mild days such as the day the pair was shot to death.

“(It’s) in a highly trafficked area, especially in the late afternoon and early evening weekday hours,” Smith said. "There are numerous joggers, walkers, bicyclists, kayakers and even vehicles cutting through the area to avoid interstate backups and this is true to this area on any given day."

He added: “There was plenty of people and plenty of activity in the park.”

Dolan and Smith also revealed some previously unreleased information about the nature of the relationship between Brown and Sledge saying that, contrary to some previous reports, the two had been friends for over 10 years, and their relationship was not romantic.

The FBI and Cleveland Metroparks recently tried to temper public panic about a double killing in a popular outdoor destination during peak visiting season. In an earlier press conference, Dolan urged that there was no immediate danger to the general public giving rise to speculation that the killings were not random attacks.

Reporters from several news outlets asked both Dolan and Smith whether investigators believe the killings were targeted, but they said that the ongoing investigation precludes them from specifying in public. Smith reiterated near the end of Monday’s news conference that investigators have no reason to believe the attacks were random.

Dolan and Smith also declined to say how many credible tips investigators received, whether they’ve narrowed in on any suspects, or whether Sledge and Brown were robbed of any personal belongings before or after the shootings. Both cited the ongoing investigation in declining to release any additional details.

The FBI is still offering a $20,000 reward to anyone who can provide information that leads to an identification and prosecution of the person responsible for the deaths of Sledge and Brown.

Dolan reassured that the Cleveland Metroparks are safe and that violent crime within the parks is very rare. The last homicide in the Metroparks was two decades ago, she said.

Tips can be anonymous and should be directed to 440-331-5219.

A previous version of this story misstated the terms of the $20,000 reward.