I thought "probable cause" had been downgraded in many situations to "reasonable suspicion."
Reasonable suspicion just does not impress me at all.
I've been in it for 17 years, probable cause is what has always been required to charge a person with a crime, or obtain a search warrant. It's in the 4th amendment.
Reasonable suspicion is from Terry v. Ohio in 1967. Tjat is to stop someone for only a reasonable amount of time to investigate.