article's source @ https://downtownseattle.org/programs-services/research/econo...

    Violent crime incidents in Seattle police’s M sectors
    (the downtown core) declined 36% between June–August 2025
    compared to the same period in 2024. 
    This was the lowest number of incidents for the summer
    period since 2017.

Violent crime was down in practically every major city this summer. It's not really sudden--it's been trending down the last 2 years