A misshelved book. LIS migration with no record cleanup. Incorrect call number labels. These are stacks crimes that Tisch Library has faced for years. No inventory of the stacks has ever been completed at Tisch, but one department is determined to close the case file and resolve these mysteries. Using modern API integrations with Alma, our forensic investigators (student workers) systematically examine our crime scene. As they scan items, they are alerted to inconsistencies between Alma and what they see. These investigators pull the items and bring these “clues” to the detectives (Access Staff) who further investigate in Alma what the problems are, resolving what we can, and passing through the Chain of Custody (i.e. technical services work orders) things we cannot. Resolving a variety of "crimes" that have plagued our stacks for years, come hear about the significant progress made in ensuring our shelves and catalog match for the first time in Tisch history. At the end of this presentation, participants will be able to outline the basic components for starting an inventory project. Participants will be able to compare their current inventory processes and identify areas for improvement.