"Defund the police" doesn't mean eliminating the police, or reducing their ability to respond to in-progress violence.

It means reducing the scope of the police so that they aren't the ones dealing with things like homelessness and mental illness, things that they usually are not trained to deal with.

Here's a good explanation [1].

[1] https://www.goodhousekeeping.com/life/a33024951/defund-the-p...