I tend to agree rule in - rule out - but once it moves beyond the residence to a very specific place, it is because something led them there and it is usually not something to rule one out. It is interesting to speak with LE folks, unattached to the case.
I doubt the probable cause section of the warrant on Cisco said - we want to pry through Cisco's data and search Brad's office to rule out Brad instead of looking for a killer somewhere. :crazy:
ETA - even a defense attorney chimed in on the Cisco search:
http://abclocal.go.com/wtvd/story?section=news/local&id=6294423
"In order to even acquire a warrant to search a separate place connected to an individual there has to be probable cause for a judge to believe that that individual was connected with the commission of an offense and evidence would be found there," he said.
Knudsen, a former prosecutor and longtime defense attorney, suspects one of the things the search at Cisco concentrated on was Cooper's computers. Exactly what, if anything was turned up on Cooper is sealed up in the search warrant.
"It's pretty clear now that he's a suspect. Not just a person of interest, but a suspect," Knudsen said.