CSI - 'Strip Maul'

I have no idea what is going on in this episode, even though I was watching from the very beginning! The CSIs and a bunch of cops are walking around downtown Vegas (you know, that place where there's the arched 'roof' over a street? No idea what it's called, but my dad's been there.) 

This place!

They arrest some random people, hookers and drug dealers and a guy passed out with a horse head on and some weed in his pocket... Then there is a guy covered in blood and acting crazy with a crowd kinda gathered around him - and he's waving around a head. Ew. He hits a guy in the face with the head and drops it - then they realise that the head's a fake and he's filming it for a viral video. SERIOUSLY?! What kind of lunatic... Anyway. They're throwing him in the cop car when Nick spots a guy in a car slumped over the steering wheel, dead.
Back at the station, there's a drunken drag queen named Josh/Jocelyn saying that she beat up a cab driver because he was threatening the life of 'her' unborn child O.O and then she slaps Greg because he asks 'have you been drinking?' so they have to restrain her.
Brass is talking to Ecklie about the fact that the sherriff wants him (Ecklie) to take over her job. He says he's not even sure that he wants to continue his job anymore.
The blood on the fake head was real but not human, and the guy who was hit is having an allergic reaction. so the blood (pig's) may have a virus. The guy who was waving it around is all nonchalant like 'y'all are crazy, there's nothing wrong with my pig's blood' (other than the fact that you're randomly waving it around and getting it on people) and Greg gets super-pissed at him.
Brass asks a prostitute where she got her fancy ring, and she says it's hers so he gets mad because he recognises it as his ex-wife's engagement ring. She says another prostitute sold it to her, and Brass shows her a picture of Ellie and she goes 'that's the one.' Damn.

CSI fun fact: Ellie Brass has been in 3 episodes, but played by 2 different actors.

 Back in the other room, Jocelyn is freaking out saying 'my water broke!! My baby's coming!!' and then when paramedics come in, Jocelyn shoves people over (poor Greg keeps getting beat up!) and grabs a pair of scissors out of the belt of one of the paramedics and stabs himself in the stomach. Back from commercial, we find out he/she died, and was 'pregnant' with balloons full of drugs.
In addition, the pig's blood was fine, no pathogens, but the head-guy's camera-weilding friend Lydia is still M.I.A. and has the camera, and the fact that they walked past the place where the guy was killed means that she may have evidence on film.
Hodges has weird theories about the bullet that killed the guy in the car - it has no striations, meaning it was fired from a modified barrell, and he thinks there may have been a gun made of polymer used specifically for one hit job, which would have destroyed it as soon as it was fired once.
The prostitute ('Chastity') had the debit card that belonged to the dead guy from the car (name of Keith Dobson), and claims she partied with him and his friend, then stole his debit card and left him, alive, to go hit the casinos.
The drugs in the mule matched ones being sold by a dealer they'd arrested earlier that evening, and then when they interview him, he says he was actually buying the drugs from a clean-cut youg man named Bobby Reid, son of a city attorney, that the cops had already released.
Sara calls Lydia and convinces her to drop off the camera in a recycling dumpster so they can retrieve it without Lydia having to come in to the station (because apparently she's freaked out) and they find the camera, but Lydia was there too - dead. Head-guy Marco feels really guilty that Lydia's dead, and Sara feels bad for him.
The bullet that killed Lydia matched the caliber and M.O. of the first dead guy, but her camera caught Chastity and Bobby Reid in the car with Keith when he was alive, then leaving with Keith sitting in the car (looking dead). Chastity tells Brass that some crime boss named Roland Zahl hired her to hang around with Bobby, and swears that when she left the car, Keith was alive. She says that Ellie's living in Vegas, and Brass is surprised because he thought Ellie was living in Los Angeles. 

Roland Zahl? Someone in the writing department's getting lazy...

Turns out Jocelyn was Bobby's cousin, and he was selling drugs, Chastity was being paid to text someone to keep them updated on where she, Bobby and Keith were, then when Bobby got out of the car to talk to the other drug dealer, she left because she was scared, and the hitman moved in, and mistaking Keith for Bobby, shot him.
Russell doesn't think Hodgen's crazy plastic-gun idea isn't crazy after all, because he found this machine that can 'print' a 3D object (such as a bunch of guns) made out of several layers of polymer. There was a printer like this sold to a company owned by Roland Zahl, and trace matching the components of the gun found on the hands of the head-smacking victim (named Pak), which is what caused his allergic reaction.
Bobby's father convinced him to turn himself in, and Russell and Brass have a conversation about Ellie... This plotline always makes me feel awful, because Brass always looks so sad :( Bobby is a conceited ass, and doesn't really care that three people are dead! I hate people like that!
Brass asks Chastity if she will promise to help them and she feels like she doesn't have a choice - but then he tells her that if she does help, he'll give her some money to go back home and find her family, so that she can be close with her father like he and Ellie can't be. Dang this makes me sad...
Bobby and Chastity are re-connected with Pak so they can follow the original plan and they lure Pak in with Nick and the cops on his tail. He tells the targets to go to the food court and then he disappears off the cameras. When he turns a corner, 'Chastity' turns around and is actually an undercover cop, so they arrest him. Pak refuses to tell them who he's working for, but Brass isn't worried.
Morgan and Eckilie have a conversation about chicken soup, and then Brass goes looking for Chastity at the station, he finds out she made bail (probably paid for by Roland?) but she left him his wife's ring and a note saying thanks, but that he should try to find Ellie.
UGH this episode was such a mess, so many people and names and plot twists I can't keep straight... Also, what happened to the guy with the horse head??

No, not this one...

Side note: that street with the giant roof is called the Fashion Arcade. They mentioned it like ten times this episode lol I can't believe they've never had another episode set there!