[s2e10] The Hour Of Death -

The police department is compromised from the inside by an intern who uses his access to stalk and manipulate the lead detectives. Other Possible References

Analyze Ryan's psychological state. He is a Wesen who wants so desperately to be a "heroic" Grimm that he becomes a monster to his own people. [S2E10] The Hour of Death

The episode explores the dark history of Nick's ancestors (the Endezeichen ) and how their legacy of brutality still haunts the present. The police department is compromised from the inside