Human remains found during an Earth Day cleanup Saturday belong to a 32-year-old Indiana mother who went missing in December, PEOPLE has learned.

Jaime Beasley's family had been searching for her since she vanished on Dec. 15, 2017 after sending a text to a friend at about 10:45 p.m., according to a Facebook post by her family.

On Saturday, a group of volunteers who cleaning up their Indianapolis neighborhood for Earth Day — which officially falls on Sunday — made a grisly discovery when they found human remains along a creek, local station CBS 4 reports.

The partially covered remains were discovered on the city's east side around 11 a.m., the Indianapolis Metropolitan Police Department told local station FOX59.

On Monday afternoon, the Marion County Coroner's Office in Indianapolis confirmed to PEOPLE that the remains were Beasley's.

Police who arrived at the scene on Saturday said they believed the remains were those of a female and called in homicide detectives to investigate, Fox News reports.

Beasley's sister, Susanne Gill, came to the scene where the remains were found.

"It scares me because it's so close to the house she went missing in," Gill told reporters before the remains were identified, Fox 59 reports. "We've checked here several times, many people have checked here."

Beasley, who has a 9-year-old daughter, had no personal items with her when she went missing, her family's Facebook post says.

She was going to spend the holidays with her family out of town but never arrived, the post says. She has had no contact with her family or friends since she vanished.

PEOPLE's attempts to reach Beasley's family were unsuccessful.

Anyone with information should contact the IMPD's homicide office at 317-327-3475 or Crime Stoppers at 317-262-TIPS.