I need to prepare for Christmas dinner with my lib family and need well sourced arguments, since I will attack people from the left, the side of the political spectrum that needs sources for every claim. Anyway, sources like The Intercept or Jacobin are still acceptable.
This is a good summary by a former public defender: https://www.nytimes.com/2019/01/17/opinion/kamala-harris-criminal-justice.html
Article about how she campaigned as a tough-on-crime prosecutor: https://theintercept.com/2019/02/07/kamala-harris-san-francisco-district-attorney-crime/
This is a very long article about the futility of "progressive prosecutors" in general. I've only had time to skim read it for now but it looks good from what I've seen: https://harvardlawreview.org/2018/12/the-paradox-of-progressive-prosecution/
Other assorted articles about her:
https://medium.com/@bendalessio17/as-an-attorney-i-cannot-vote-for-a-ticket-that-includes-kamala-harris-b1b0b1014d52
https://jacobinmag.com/2017/08/kamala-harris-trump-obama-california-attorney-general&mc_cid=4c6667d825&mc_eid=a87a1d7450
https://consortiumnews.com/2020/08/13/kamala-harriss-distinguished-career-of-serving-injustice/
https://www.democracynow.org/2020/8/13/kamala_harris_prosecutorial_record_2020_election
https://theappeal.org/kamala-harris-criminal-justice-record-killed-her-presidential-run/
https://jacobinmag.com/2020/08/kamala-harris-silicon-valley-donors-vp/
https://jacobinmag.com/2020/08/joe-biden-kamala-harris-vice-president-neoliberalism/
https://www.truthdig.com/articles/theres-nothing-progressive-about-kamala-harris-record-as-a-prosecutor/