How did Irish immigrants become a big part of the USA police force?

What is with the stereotype of the Irish Cop? I have seen this in fiction, when I was young it seemed like half of fictional law enforcement were Irish. In the real world Irish culture has a strong present in the culture of modern day policing. Where did it come from?

This week's dive into cultural history is a story of immigration, discrimination, brutal capatilism leading to mass corruption, and how an immigrant group can be pressured into infighting with other immigrants. For Patrons of the show (who get the second half) there is also a touching story of modern Irish advocacy and referrals to Irish American Groups advancing rights of immigrants today. Here are links to the organizations mentioned:

https://www.instagram.com/reel/DPwq0sGkji-/ (Story of the Grapefruit Ladies)

https://www.irishamericandems.org/ (Irish American Democrats)

https://www.aaidnet.org/ (African American Irish Immigration)

https://aoh.com/ (Ancient Order of Hibernians)

https://ciic-usa.org/member-centers/ (Coalition of Irish American Center)

AND of course our highlighted charity this month: www.chirla.org, the Coalition fo rHuman Immigrant Rights