Brazilian authorities arrested a man in connection with the killing of New York art dealer Brent Sikkema in Rio de Janeiro. The suspect was apprehended at a gas station 600 miles northwest of Rio. Security camera footage showed the man near Sikkema's home before his death. Sikkema, 75, was known for representing contemporary artists and nurturing a generation of creative talent. The gallery he co-founded, Sikkema Jenkins & Co., plans to announce a memorial to honor his life and work.