I've been trying to follow this case, but your thread title says the tribal police returned the baby. The article doesn't say that. The last I knew, the parents had no idea where their child was. Have I missed something?
[Edit to add] Okay, I thought this was the same article I had read previously, but this one does say they returned the child. )Looks like the Miami Herald updated it without making clear what they updated.) That's good news. I still say shame on the Metro-Dade PD for not knowing the tribal court order was invalid.
A recognized Native American tribe is a sovereign nation. If someone showed up in Metro-Dade with a court order from Germany, Italy, or South Africa (sovereign nations), I don't think they would serve it without getting a signoff from a U.S. federal judge. This should be no different.