The Breitbart page on this interview:

http://www.breitbart.com/radio/2016/11/04/erik-prince-nypd-ready-make-arrests-weiner-case/

The source quoted by Prince about an NYPD chief appears to be truepundit:

https://truepundit.com/breaking-bombshell-nypd-blows-whistle-on-new-hillary-emails-money-laundering-sex-crimes-with-children-child-exploitation-pay-to-play-perjury/

Further links:

https://www.truthrevolt.org/news/shock-claim-hillary-visited-pedophile-jeffrey-epsteins-sex-island-6-times

https://www.zerohedge.com/news/2018-06-25/mueller-snags-blackwater-founder-erik-princes-phones-computer