@Frank Apisa,
The Brookings Institute piece that Lash linked is very good in terms of identifying problems and pointing to where remedies ought to be put in place and what those remedies might look like. Lots of work has been done over many years by those in social sciences, law and policy on improving police forces, as should happen.
But Lash's complaints are that "progressives" have cowered in fear over the phrase "defund he police" and have therefore lost opportunities to bring such changes into effect. The implication is that those "progressives" aren't really legitimate progressives and bear significant responsibility for little change having been accomplished in this sphere. This echoes a common theme with her (eg Warren isn't a legitimate "leftie"). Or to put it another way, "Don't support the Dems".
She gets it mostly right when she says that the Reagan period is where pro-police rhetoric/ideology ramped up but of course Nixon was no slouch on the campaign to suggest that "Democrats are soft on crime". This is a long standing wedge issue (and falsehood) Republicans have been pushing since at least the 60s as a means to derogate the Dems AND to foster fears among their base and beyond if that can be managed. Not merely fears of chaos but particularly fears of blacks.
As to the phrase, "defund the police", there are very good reasons to eschew the phrase, the main reason being that the literal meaning fits perfectly for rightwing agitprop purposes which is rather clearly evidenced by anything that's ever been said on Fox where that phrase is in play.
Now let's see if Lash can find ANY instance where some progressive or moderate Dem has dropped any prior initiatives they were involved with to improve policing.