fred has been arrested for murder what are his rights at police station and are they adequatly protected during detention searches and interviews

Answer 1

The charge is "suspicion of homicide," but treatment will vary depending on the area, the branch of law enforcement, and the behavior of the suspect when arrested.

Answer 2

He should have been read his Miranda rights, and should exercise his rights. He should only ask for an attorney. Yes he is adequately protected, again, so long as he does not vacate his rights, and also how he is handled will be dependent upon his actions, reactions, behavior, demeanor, etc.