Trinity killed Lundy.
Also, I'd like to thank Trinity for showing Dexter how to live with his "dark passenger", somewhat out in the open, Because now Rita can stop being such an annoying Bee-Awtch!!!.
As for the argument that Rita's behaviour was different in the past because she was abused by her ex, B.S!!!......Rita's behaviour has changed because Dexter backed down everytime she pushed him. Give em' an inch, and They'll take a mile!
The whole "who killed Lundy" thing is begining to make me nervous. Some people feel strongly that it wasn't Trinity. If this turns out to be true I'll be disappointed because Dexter has never really been about tacky soap opera style twists. Yes there have been "twists" in past episodes, but not the type I just described. As
Flip mentioned, If Lundy's killer turns out to be Anton or an equally preposterous character, It will also be the last "Dexter" I watch.
***That reporter, although a bit of a "butter face", is a great addtition to the show!!