Brazilian police said that they are investigating whether the estranged husband of Manhattan art dealer Brent Sikkema was acquainted with the Cuban suspect who was arrested this week for Sikkema’s brutal murder in Rio de Janeiro, according to a Brazilian news report.

Sikkema, 75, whose Chelsea gallery Sikkema Jenkins & Co. represents Vik Muniz and Kara Walker, among other high-profile artists, was found on Monday, dead from multiple stab wounds to his throat and face in a home he owned in the beachfront city.