Dos Santos, 24, had been shot three times in the abdomen on Monday in front of home on the Guarda do Embau beach, near Florianopolis.

Arruda says the officer who shot the un-armed surfer says he did so in self-defense. But other witnesses say officer Luis Brentano shot dos Santos after they got into an argument. Arruda offered few details, pending the investigation.

The suspect is in jail, but he's not yet charged. Under Brazilian law, prosecutors only level charges once the police investigation is complete.

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