What it takes to kill a wolf

In this story a 16 year old girl named Odette is suprised by a pack of Crimson Hollow pack members when she finds her mate with the alpha. The Pack lives in California while she lives in Arizona. Having to move to california she leaves her culture, friends, and her tribe. Trying to fit in with the pack is harder than she imagines. Making a friend, Lily, she now knows she can make it in her new life. There are killing happening all of a sudden when She moves to california, not knowing the enemy, the pack members start blaming eachother including Odette. Who's the killer? Why is he doing this? Is he/she someone we know?