Footprints, a Seth and Ava Novella - Seth and Ava Mysteries, #7

Ava and her team head out to the Pawnee National Grasslands to help exhume the remains of fifteen Native American women. Originally tasked to find the killer of a friend of Frederico Alvaraz, the case blows up as they discover multiple remains buried over decades. In the process of working this case, Ava and her team find hundreds of unprocessed rape kits from local Native American peoples. Soon, they are processing rape kits from Native American peoples from all over the country.
As they close in on some of the perpetrators, the men decide to come for Ava. While Seth was in the hospital after being shot, Ava and her team won a grant to bring modern forensics to 10 cold cases in rural Colorado. Ava was asked by Frederico Alvarez, an investigator for the Colorado Commission of Indian Affairs, to look into the death of a friend of his, Gina Young Raven. Gina's body was found on the Pawnee National Grasslands, in the farther most north-east corner of the state of Colorado,.
Using Seth's military ties, the team discovers 15 burial mounds. The case gets more and more complicated as the team works the case. They need to pull together every resource and all of their friends to solve these murders and bring justice to these peoples.