The man accused of shooting his neighbors last month, killing one, has died of a self-inflicted gunshot, the Milwaukee County Medical Examiner's Office confirms.

Milwaukee police had been searching for Leslie Bost for weeks. Officers "were checking for a wanted subject" Tuesday who was "inside a residence when officers knocked and announced. Shortly after, officers heard a firearm discharge from inside the residence. The individual was located deceased of a self-inflicted gunshot," FOX6 News Milwaukee reported.

Bost, 57, was charged with one count of first-degree reckless homicide, use of a dangerous weapon and four counts of first-degree recklessly endangering safety, use of a dangerous weapon.

The shooting that killed 82-year-old Shirley Mallory and injured three others happened Aug. 24. A subsequent house fire took place at the home next door, associated with suspected shooter Bost.

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Alleged Milwaukee neighbor shooter Leslie Bost dead, victim's son says. (Milwaukee Police Department)

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A warrant was issued for Bost's arrest on Sept. 1, online court records showed.

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Bost's sister was at the Mallory home during the shooting but wasn't injured due to hiding in a closet. She reportedly told investigators she didn't have "any idea" why her brother would have shot at the group but called him a "private person who holds grudges for a long time."

Milwaukee manhunt over after alleged neighbor shooter dies, medical examiner says

Milwaukee police had been searching for shooting suspect Leslie Bost for weeks