Well, that press release was issued Jan 3 2025 by the incumbent appointed by the Biden regime. Whichever way you want to argue it... it's political.
The wikipedia article about then-US Attorney for DC includes this note:
"Under Graves, the US Attorney's Office declined to prosecute 67% of those arrested for crimes in DC in 2022, including 72% of misdemeanor arrests and 53% of felony arrests."
Crime is always down if you don't prosecute crime. Murder stats are the best to consider since those a harder (but not impossible) to fudge.