References
Here are some studies and news reports about the benefits of mindfulness practices for further reading.
How mindfulness affects the brain
Mindful Attention to Breath Regulates Emotions via Increased Amygdala–Prefrontal Cortex Connectivity(NeuroImage, 2016)
How Meditation Strengthens The Anxiety-Relieving Prefrontal Cortex(EOC Institute, 2016)
When Science Meets Mindfulness(Harvard Gazette, 2018)
Existing meditation programs in prisons
Prisoners Benefit From Meditation(BBC, 2001)
Walpole Study of the Transcendental Meditation Program in Maximum Security Prisoners II(Journal of Offender Rehabilitation, 2003)
How Meditation Reduced Violence in a Mexico Prison(Insight Crime, 2016)