UPDATE: Man killed by his mother and sister in bid to control 700-acre family ranch, say cops

Soon after a woman was arrested in connection with the 2015 death of her brother, the victim’s mother was arrested on suspicion of the same crime and is expected to face first-degree murder charges.

As CrimeOnline previously reported, 33-year-old Stephanie Jackson was arrested Wednesday near the ranch on which Jacob Millison’s remains were found last year.

The victim was first believed to be missing in May 2015 and was the subject of an official missing persons report later that year. He was 29 when he disappeared.

Remains recovered last August were determined to be his.

Though authorities have reportedly determined the cause of his death, they are not yet making that information public.

Two days after Jackson’s arrest, her mother was arrested.

While the Grand Junction Daily Sentinel reported that 68-year-old Deborah Sue Rudibaugh is facing a first-degree murder charge, Gunnison County Undersheriff Mark Mykol offered few details.

“She is a suspect,” he said, without elaborating on her suspected role in the crime.

Jackson allegedly planned her brother’s murder in an effort to control the 700-acre family ranch reportedly worth millions of dollars.

Following her arrest, Mykol confirmed the investigation remained ongoing.

Jackson was booked into jail with bond set at $500,000 and is expected to face a slew of charges including murder and tampering with a corpse.

As of the latest reports available, Rudibaugh was being held without bond on similar counts.

[Featured image: Stephanie Jackson/Gunnison County jail]