Danny questions a man covered in his girlfriend's blood on Blue Bloods. "Devil's Breath" is the 21st episode of the show's third season.
Added:

Blue Bloods Season 3 Episode 21 Quotes

Carter: I came to New york to ask her to marry me.
Danny: I'm assuming she said no.

I like hearing you talking to your mother. She's probably the only woman you don't lie to.

Jamie