Jmo there is a zero percent chance that LE is watching a suspect. That is not what they are saying, nor is how they are behaving. Imo they are desperate for a valid suspect.
LE said with this murder investigation few details have been released to the public. LE doesn't want to compromise the investigation, this would explain how they are behaving. But neither do we know what evidence investigators do have. Sometimes reading between the lines gives insight what possible is happening.
Your correct they are desperate for a valid suspect.
I do feel the unsolved murder of the girls, keeps LE up late at night, hoping the next day
they will provide answers to Abby and Libby's families so they can begin the healing process.
JMO
I think of King County Sheriff Dave Reichert and the Green River Killer Gary L Ridgeway, he was a suspect for years
before LE announced his arrest.
He came too police attention in April 1983, a victims boyfriend followed a pickup suspected in the disappearance,
it was identified as Ridgway's.
May 1984 Ridgway reached out to Green River Task Force offering information, passes a polygraph test.
April 1987 LE searched Ridgway's home and vehicles, he was the last person seen with two victims.
LE took bodily samples from Ridgway, but there was insufficient evidence to arrest him.
Nov 2001 LE announced the arrest of Green River Killer.