George Landers died and his younger brother Michael Landers was hospitalized March 19 from what police believe to be drug overdoses.
An autopsy on the 25-year-old Croton-on-Hudson man is planned for this morning, the Westchester County medical examiner's office said.
Police had intersected the Landers brothers' connection with drugs twice in the past six months.
Michael Landers was arrested Aug. 17 with 69 glassine envelopes of heroin after police responded to a tip about a drug sale going down on Lark Lane, The Cortlandt Daily Voice reported.
Lark Lane is a cross-street with Wren Lane in the Ridge Hill Homes townhouse development where Michael and George Landers live with their father.
At the time Michael Landers was charged with criminal possession of narcotics and criminal possession of a controlled substance with intent to sell, both felonies.
He had just turned 23.
The case was reduced to seventh-degree criminal possession of a controlled substance, a misdemeanor, and closed in Croton Village Court Feb. 20 with a fine and a surcharge.
In September 2012, George Landers had been arrested by state police and charged with possession of a hypodermic instrument, aggravated unlicensed operation of a motor vehicle and criminal possession of a controlled substance, all misdemeanors. He had been arraigned in October and was due in Cortlandt Town Court March 22.
Police are investigating yesterday's incident but believe the heroin may have been too strong or tainted, officers told Newsday.