The body of Julian Ingram, 37, was found on Monday, months after he allegedly killed his pregnant former partner Sophie Quinn, her aunt Nerida Quinn and John Harris at the western NSW town of Lake Cargelligo on January 22.
NSW Police discovered the body with his white getaway ute about 50km away from the rural town.
The 37-year-old was believed to have committed the killings just hours after reporting for bail at a local police station.
Ms Quinn, 25, and her friend John Harris, 32, were killed when bullets were fired into a dark hatchback on Lake Cargelligo's Bokhara St about 4.20pm.
Soon after, her 50-year-old aunt was shot dead at a home on Walker St, a two-minute drive away.
Kaleb Macqueen, 19, was also shot at the home but survived with serious injuries.
Police had previously searched the remote outpost of Mount Hope, a former mining town about 90km northwest of Lake Cargelligo.
A $250,000 reward was put on offer for information that would assist in catching Ingram in March.
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