So excited for this.

- it is an optimistic call for us to do the real hard work of being serious and honest in evaluating the things we try, and if they don’t work to adjust and try again, and that yes: there are proven solutions out there and more to come.

Check it out!

Often, the emphasis on rigorous research methods and empiricism are dismissed by advocates as nay-saying skeptics and criticism. This book shows the opposite…

In the book, Jen does an excellent job of showing the policy, real-life, and research decision points that emerge at each step of the CJ system - from prevention through reentry, and even to intergenerational effects. And she shows how rigorous research can point us to what really works.

No, this is not just because she’s a friend, colleague, and boss! It’s because this is a book filled with optimism and hope about *proven* solutions to public safety challenges across the entirety of our criminal justice system.

Just finished reading my copy of “The Science of Second Chances” by @jenniferdoleac.bsky.social and I can’t recommend it enough. (Thread)

SHOULD THE U.S BLOT OUT THE SUN AND USHER IN AN AGE OF ETERNAL DARKNESS? - Gallup 2/20/26-3/5/26

NO - 41%
YES - 38%
UNSURE - 21%

Colorado has emergency domestic violence shelters in only half its counties, leaving survivors without safe housing options A lack of shelters and affordable housing means survivors of domestic violence have few places to go.

Housing is tough for everyone right now, but for survivors of domestic and sexual violence who lose their housing, the challenges can be impossible.

In my latest for @us.theconversation.com, I discuss limitations to local shelter availability, and why Section 8 is not a viable long-term solution.

Republican, Democrat pitch plan for new fund to help solve violent crime in Utah A bipartisan proposal to help police solve violent crimes was unveiled Tuesday at the Utah Legislature.

Solving and preventing violent crimes should be our number one priority. Utah taking action.

“Republican, Democrat pitch plan for new fund to help solve violent crime in Utah”

www.ksl.com/article/5143...

For these reasons, the IACP calls on the White House to use its convening authority, as soon as practicable, to bring together thoughtful federal, state and local law enforcement leaders for policy level discussions aimed at identifying a constructive path forward.”

At the same time, the IACP underscores that officer safety is inseparable from community safety and must remain a fundamental priority in all public safety decisions.

The IACP reaffirms its commitment to the constitutional protections that safeguard individuals from unlawful or unreasonable searches and seizures, recognizing that public trust and effective policing depend on faithful adherence to these fundamental rights.

The IACP urges leaders and stakeholders to support calm, lawful engagement and policies grounded in proven practice that strengthen accountability while preserving the capacity of law enforcement agencies to coordinate effectively and protect communities.

In times of uncertainty, officials at all levels play a critical role in de-escalating tensions by using measured, responsible rhetoric that reinforces lawful processes and public trust rather than deepening division.

The IACP emphasizes that effective public safety depends on comprehensive training, investigative integrity, adherence to the rule of law, and strong coordination among federal, state, and local partners.

Periods of heightened tension place significant strain on public safety systems and underscore the need for stability, professionalism, and respect for constitutional principles.

Statement and call from IACP the world’s largest professional association of police leaders:

“The International Association of Chiefs of Police (IACP) is concerned by the ongoing challenges affecting public safety, law enforcement professionals, and the communities they serve.

I just updated my spreadsheet of crime-related papers published in top economics journals:

docs.google.com/spreadsheets...

1. Police staffing & workforce capacity matter.

2. Those officers should be deployed strategically and precisely.

3. Improving investigations and solving crimes delivers justice and prevention. We do a poor job currently.

4. Modern data systems are essential to measure progress and improve trust.

Thankful to have presented today to Washington state’s House Committee on Community Safety for their work session on crime data and law enforcement effectiveness.

My four main points that evidence tells us…

Episode 7: Everything You Ever Wanted To Know About NIBRS But Were Afraid To Ask with Dr. Susan Parker

New pod is out! Everything you ever wanted to know about NIBRS but were afraid to ask w/researcher Susan Parker. A great deep dive into the potential & pitfalls of NIBRS.

Apple: podcasts.apple.com/us/podcast/e...

Amazon: music.amazon.com/podcasts/cad...

Spotify: open.spotify.com/episode/3xYN...

We can do more to improve how clearance rates are reported, but most importantly, we must do more to support agencies and communities to be able to solve more crimes. Pressure without support leads to shortcuts and unrealistic mandates.

Arnold Ventures on X: "A new story from @amandavhernan in Stateline dives into the issue of clearance rates and discusses how policymakers at the state level are working together across the aisle to solve more crimes and improve public safety. Read it here: https://t.co/3E9ktYCvBV" / X A new story from @amandavhernan in Stateline dives into the issue of clearance rates and discusses how policymakers at the state level are working together across the aisle to solve more crimes and improve public safety. Read it here: https://t.co/3E9ktYCvBV

Happy to talk w/Stateline about clearance rates.

Clearance rates are a fundamentally important metric for how well our public safety system is working by focusing our attention on solving crimes. Solving crimes w/certainty & swiftness is also proven to prevent future crime.

x.com/arnold_ventu...

Investing in Summer Youth Employment Programs Creates Stronger, Safer Communities To reduce crime, enhance public safety, and improve outcomes for people involved with the criminal justice system, we need to follow the evidence. Across the country, we have seen how proactive str…

Summer Youth Employment Programs are proven to reduce crime & violence, & offer at-risk youth a more constructive path forward. Now is the time to scale them fully.

Read more here: "Investing in Summer Youth Employment Programs Creates Stronger, Safer Communities"

marckrupanski.com/2025/09/15/i...

We have a long list of policy options to reduce crime, such as:

• Improving police staffing & presence
• Strengthening investigations & case clearances
• Better DNA collection & analysis
• Scaling summer youth employment programs
• & more…

Reach out to discuss what could work in your state or city

Six Republican governors sending National Guard troops to D.C. Six GOP governors are sending National Guard troops to assist in Trump's D.C. crime crackdown, even though crime levels in major cities in some of those states are higher than in the U.S. capital.

Thanks to @npr.org for the opportunity to weigh in on what’s happening in DC and how to best address violent crime.

www.npr.org/2025/08/20/n...

One thing that didn't make it into today's piece:

Washington, DC already has by far the highest number of law enforcement officers per capita of any city of 250k+.

A few of the things we are trying are noted here: pilot what has worked in related fields, focus on improving recruitment and retention of women, and identifying those roles that civilians can do to free up officer time.
/end

This is an incredibly important issue where we can’t simply throw things at the wall and hope they stick, but - especially in a changing labor market - need to be more intentional and rigorous in piloting, testing, and replicating what works. /3

“Safer States: Shoring Up the Public Safety Workforce” Thankful to have had the chance to present and moderate a panel at the 2025 National Conference of State Legislatures (NCSL) Summit on “Safer States: Shoring Up the Public Safety Workforce.” …

I wrote a short post here on some of the points I addressed on police staffing.

marckrupanski.com/2025/08/07/s...

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