My first degree is in a completely unrelated field. I took some anthropology classes to get a 2nd bachelors degree but was unable to finish. The schools I applied for specifiy you can apply with an unrelated degree if you can prove you have a strong interest in the field. There aren't any ways (that I've found) to get a job in forensic archaeology or crime scene investigation without an advanced degree (so even if I'd have been able to finish my degree in anthropology, it still wouldn't give me a shot at the field I want to be in . . . I've looked everywhere to gain experience instead of spending more money on a Masters degree but by the looks of it, it's not possible).
But that also didn't answer my question. I only wanted to know, basically, how much weight a PgD might hold in the U.S. as far as job outlook vs an MsC.