Brent Sikkema attends the New York City Opera opening of Margaret Garner at New York State Theater on September 11, 2007 in New York City. WILL RAGOZZINO/PATRICK MCMULLAN VIA GETTY IMAGES

A suspect was arrested in the brutal killing in Brazil of a preeminent American art dealer who was the co-owner of a prominent gallery in Manhattan, police said Thursday. Brent Sikkema, 75, was found dead on Monday with 18 stab wounds in his Rio de Janeiro apartment.

Rio state police arrested a man who they identified as Alejandro Triana Trevez near the city of Uberaba, in the neighboring state of Minas Gerais. The man, who local media say is Cuban, was on the run and was found resting in a gas station.

Police said that Trevez allegedly took $3,000 from Sikkema's home. Detective Felipe Curi, who leads the state police homicide unit, told CBN Rio that the main line of investigation is theft leading to homicide.

"Initial findings of our investigation indicate that Alejandro (Trevez) came from Sao Paulo specifically to commit this crime," Curi said. He then returned to Sao Paulo, leading investigators to believe he had "some kind of privileged information."

Law enforcement obtained a 30-day prison warrant against Trevez, which Curi said would allow them to explore other leads and answer questions such as whether the two men knew each other.

Originally founded in 1991 as Wooster Gardens, Sikkema Jenkins & Co. shows works by Jeffrey Gibson, Arturo Herrera, Sheila Hicks, Vik Muniz, Kara Walker and other artists on 22nd Street in New York near the Chelsea Piers.

In a statement on its website, the gallery confirmed the dealer's death.

"It is with great sadness that the gallery announces the passing of our beloved founder, Brent Sikkema," the statement read. "The gallery grieves this tremendous loss and will continue on in his spirit."

Sikkema began his career in 1971 at the Visual Studies Workshop in Rochester, New York, where he worked as director of exhibitions. He opened his first gallery in 1976 in Boston.

In 2021, during a trip to the Swiss city of Zurich, Sikkema described himself on Instagram as a "chaos kind of guy" and said Brazil and Cuba were his preferred type of destination.

"I'm shocked," longtime friend Yancey Richardson, who owns a nearby art gallery, told the New York Times after Sikkema's death "Brent had a terrific eye and thought outside of the box. He wasn't just mounting one painting show after another."

Sikkema told IdeaFix in 2022 that he still lived most of the year in New York but called his apartment in Rio de Janeiro apartment an urban "oasis."

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