Quotes from that article:
Fremont County Sheriff Len Humphries tells EastIdahoNews.com that law enforcement recently obtained sufficient probable cause to get a search warrant for the home. Officers are searching for forensic evidence such as blood or chemicals, which might shed some light on the Daybell case.
“This has been in the works for several days,” Humphries said. “When you are doing an investigation, you have to accumulate evidence, and the process takes time.”
Humphries would not say what the sufficient probable cause was that allowed them to get the warrant. He did say investigators could be at the scene for most of the day.