Margaret Mizushima

He was suspect number one - the man who tried to kill Deputy Mattie Cobb and may have killed her father 30 years earlier. But when Mattie and cold-case detective Jim Hauck reach the Colorado state prison where they will finally get to interview him, he's found dead in his cell....

An explosion outside a community dance sends Mattie Cobb and Cole Walker reeling into the night, where they discover a burning van and beside it the body of outfitter Nate Fletcher. But the explosion didn’t kill Nate - it was two gunshots to the heart....

Colorado's Redstone Ridge is a place of extraordinary beauty, but this rugged mountain wilderness harbors a horrifying secret. When a charred body is discovered in a shallow grave on the ridge, officer Mattie Cobb and her K-9 partner, Robo, find this is no ordinary crime....

When a young girl is found dead in the mountains outside Timber Creek, lifelong resident Officer Mattie Cobb and her partner, K-9 police dog Robo, are assigned to the case....

When Deputy Mattie Cobb and her K-9 partner, Robo, get called to track a missing junior high student, they find the girl dead on Smoker's Hill behind the high school....

When Deputy Ken Brody's sweetheart goes missing in the mountains outside Timber Creek, Mattie Cobb and her K-9 partner Robo are called to search....

A deluge has flooded the high ground near Hanging Falls - but heavy rains aren't the only menace descending on Timber Creek. While on a scouting mission to pinpoint trail damage, officer Mattie Cobb and her K-9 partner, Robo, stumble upon a body floating at the edge of a lake....