"The Closer" tv show question (spoilers)

The last episode, the one with the Tijuana drug cartel storyline — did I completely misread the ending, or did Brenda actually let the guy go into the jail using the other dude’s name, knowing that he’d be killed … and that he was killed?

Or did I miss a line somewhere that said they only made it look like the guy was dead, so that the cartel would be off his back?

If it’s true, I’m still trying to decide how I feel about that. Because the dude deserved to die, definitely. But putting him in there with the other guy’s name knowing for certain that he wouldn’t come out? … just not sure how I feel about that.

And why be concerned about that one dude a few episodes back, when she tried to convince him not to act as an FBI informant because he’d just end up dead (and he’d have better chances in prison?)

Also, thank god for episodes online and On Demand, so that I can catch up on the few shows I watch anymore while stuffing my face full of food.