CHICAGO (STMW) — Two brother-in-laws who were involved in a business venture together were found dead in an apparent murder-suicide in northwest Indiana on Sunday night.

About 6:10 p.m., officers responded to a shots fired compliant in the 8600 block of Linden Avenue, and found two unresponsive men with gunshot wounds, according to Munster police.

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Theodore Surman of Munster was found lying in a snow bank on Linden with a gunshot wound to the chest, a statement from police said. A semi-automatic pistol was found next to him.

The second man, Mario Martinez of Portage, Ind., was lying in the street next to his vehicle with a gunshot wound to the head, according to police.

Both were taken to Community Hospital in Munster, where they were later pronounced dead, police said.

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Preliminary information indicates Surman and Martinez were brothers-in-law who were involved in a business venture together. The two were leaving a home prior to the shooting, police said.

The shooting is thought to be a murder suicide, according to police.

Further details were not immediately available.

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