NEW YORK (CBSNews/CBSNewYork) – As part of a year-long probe into policing in America, CBS News contacted more than 150 police departments across the country to learn more about their racial bias and de-escalation training.

The training teaches officers how to recognize and minimize the negative effects of unconscious biases we all have, including race.

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The report was released Wednesday, ahead of the five-year anniversary of Michael Brown’s death in Ferguson, Missouri.

What they found:

  • At least 69% reported they do have implicit racial bias training and 57% of those departments said it was added in the five years since Michael Brown was shot to death by a white police officer in Ferguson, Missouri, sparking months of protests nationwide.
  • About 59% of the agencies that responded to follow-up questions say they do not have a way to measure the success or failure of those programs.
  • More than 70% of the departments we contacted completed our survey and 75% of departments who responded told us that they changed their training practices after controversial use-of-force incidents.
  • Of the departments that reported having implicit bias training, 90% say they make it mandatory.

Reports from Tri-State Area:

New York:

New York City

  • Implicit racial bias training since 2018. Mandatory. Training frequency: 8 hours at varying frequencies.
  • De-escalation training since 2015. Mandatory. Training: 32 hours. Did not answer question of how frequently training takes place.

Buffalo

  • Implicit racial bias training since 2017. Not mandatory. Training frequency: 1 hour once per year.
  • De-escalation training since 2018. Not mandatory. Training frequency: 1 hour once per year.

Rochester

  • Implicit racial bias training since 2017. Mandatory. Training frequency: 8.25 hours once every 2-5 years.
  • De-escalation training since before 2005. Mandatory. Training frequency: 4 hours once every 2-5 years.
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New Jersey:

Newark

  • Implicit racial bias training since 2018. Mandatory. Training frequency: 8 hours once per year.
  • De-escalation training since 2018. Mandatory. Training frequency: 4 hours once per year.

Jersey City

  • Declined to participate

Paterson

  • Implicit racial bias training since 2013. Mandatory. Training frequency: 3 hours once every 2-5 years.
  • De-escalation training since 2017. Mandatory. Training frequency: 30 minutes – 1 hour more than once per year.

Connecticut:

Bridgeport

  • Declined to participate.

New Haven

  • Did not respond to survey after multiple follow-ups.

Stamford

  • Unsure if they offer implicit racial bias training.
  • De-escalation training since before 2005. Mandatory. Training frequency: 8 hours once per year.
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Click here to read the full report.