A Contra Costa County family is offering a $10,000 reward for information leading to the arrest and conviction of a suspect or suspects in a woman's killing, county sheriff's officials said.
The reward is being offered for information in the killing of Danville resident Emily Courchesne, who was found dead Oct. 6, 2017.
At 10:05 a.m. that day, deputies were dispatched to a home in the 24000 block of Marsh Creek Road in unincorporated Contra Costa County near Byron where they found Courchesne's body inside the home, according to sheriff's officials.
Detectives later determined that it was a homicide and believe Courchesne was killed sometime between the evening of Oct. 4 and the early morning hours of Oct. 5.
Sheriff's officials said that the Danville woman had been house-sitting her uncle's home, which is on a farm in Byron.
Marjory Couchesne says she thinks about her daughter every day. It’s been five months, and she has no idea who killed Emily or why.
"It would be nice to know," she said. "I just want the person who did this off the street."
Investigators say they have no suspects, no person of interest, and they aren’t saying if more than one person is responsible.
Anyone with information on the killing is asked to contact investigators at (925) 313-2600 or call the anonymous tip lines at (925) 313-1166 or (866) 846-3592.
Tips can be emailed to firstname.lastname@example.org.
NBC Bay Area's Cheryl Hurd contributed to this report.