Federal police were alerted promptly and managed to arrest a 16-year-old Russian, subsequently handing him over to legal guardians.
This incident is part of a series of recent attacks on Ukrainian individuals in different countries, raising concerns about the safety of Ukrainians abroad.
Similar attacks by Russian nationals on Ukrainian individuals have been reported in Poland, Scotland, the Czech Republic, and other locations, which may indicate a disturbing trend of targeting Ukrainians in different regions.
I don’t think that that’s true of the US. I mean, sure, federal police agencies might well be involved in nationally-important cases, but they have specific areas of authority too.
Most postal crime probably isn’t a huge incident of national importance, for example:
https://en.wikipedia.org/wiki/United_States_Postal_Inspection_Service
I doubt that the Forest Service’s law enforcement wing has had all that many national-importance cases:
https://en.wikipedia.org/wiki/United_States_Forest_Service