Worcester County District Attorney Joseph Early Jr. announced on Wednesday that witnesses reported seeing a dark-colored SUV parked on Brooks Station Road in Princeton around the time of Vanessa Marcotte's murder.
The 27-year-old was in Princeton visiting her mother on August 7th when she went out for an afternoon jog and never returned.
Her body was found later that night in a wooded area about a half mile near her mother's home.
Investigators believe that she struggled with her killer and may have left "scratches, scrapes and/or bruises" on them.
PHOTOS: Police investigate murder of NYC woman in Massachusetts
Marcotte was living in Manhattan and working as an account manager for Google.
Anyone with information is asked to call the dedicated tip line at 508-453-7589.