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Law enforcement officials say Gavin Long, who killed three Baton Rouge police officers Sunday, drove to that city from Dallas.

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While here, he proselytized to workers and customers at several Oak Cliff barbershops.

Long entered three barber shops trying to sell his self-published book and preaching about nutrition and wealth.

He wore a body camera during the encounters, and Fox 4 has excerpts as well as interviews with the barbers here.