Search warrant question.

Whether it's your home or car, if police want to search your property they require a search warrant. Since a search warrant is supposed to address what, specifically, the police are searching for, I have a couple of questions for the legal beagels of the OT.

A. Are there rights to have legal representation present during the course of the search, and if so, can you demand the search can't begin until you have a legal representative present (within a reasonable time) to accompany the police during the search?

B. if a warrant is issued to search for evidence of say, the presence of stolen property, and during the search, they spot a bag of green leafy "spices". They don't know if it's weed, but they are suspicious it might be. It might be bag of oregano. Can they open it and snif it? It cetainly doesn't contain stolen property, which is what the warrant stipulated they were looking for. Can they take it under a presumption that it might be an illegal controlled substance, or are they required to request a second warrant before they can legally use this as evidence of a crime?

This references a recent action at my neighbor across the street. Police showed up with a warrant. His son goes to a local college. Something of value went missing. School admins were convinced he had it and got a judge to issue a warrant. The homeowner told police they could come in and sit in his front room or stay in their cars, but they couldn't search until his attorney was present. The police laughed in his face and threatened to arrest him if he interfered with the search and told him to step aside.

They didn't find what they were looking for, but did find a bag of weed in the kid's room and they took it for testing. So far, no arrests, but they expect a knock on the door at anytime. Since this was not what the warrant was written to search for, is the siezed weed legal evidence or not?