One detective at the Federal Heights Police Department was in charge of more than 90 cases in 2022. A memo from the 17th Judicial District Attorney's Office obtained by 9NEWS suggests that workload and a lack of staff meant the department failed to properly investigate serious felony cases. In April, the interim chief at the time, Mike Domenighini, expressed concerns about the department's police work on multiple cases. One of his biggest concerns, according to the memo by the district attorney's office, was the number of sexual assault and sexual assault on children cases that had been open for a substantial period of time. The DA's office reviewed more than 200 open cases filed in 2020, 2021 and 2022. The review included sex assault investigations and other crimes against persons or crimes-of-violence allegations. Read more: https://www.9news.com/article/news/local/federal-heights-detectives-cases-over-3-years-memo/73-031bdd14-ae61-4251-8eb6-b5ae552a9f8d ----- More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.