Forty-nine-year-old Melissa Bost was a married mother of three.
Her family is begging anyone with information to come forward.
Altus police chief Tim Murphy says investigators have questioned several persons of interest and have not eliminated any of them, but police have not yet made any arrests.
"She was a fighter," said her daughter, Chelsea Anderson. "She would fight for her family for anything. Nobody could do anything to her family. And now we're here to fight for her, because she can't do it."
Investigators are trying to figure out where the actual murder took place. They believe Melissa Bost was killed in Tuesday's early morning hours ... then her body and her dog were later put in her car and driven to the one thousand block of East Sutherland.
Around two Tuesday afternoon, someone heard the dog barking from the car in the alley -- and later called police.
If you have any information, please call Altus' Crime Stoppers. That number is (580) 482-TIPS -- or (580) 482-8477. You don't have to leave your name and you could earn a cash reward.