The final trial will deal with Blaine Chill's murder

In order to solve this mystery, first we must think about the killer's name, Hemlock. Now, Cardiovore SAID it was chosen because of Aculeus and Allebahst's plant-based naming theme, but that's just too simple. I believe that there is a much deeper explanation for this nickname. If you think about it, it's fairly obvious. Hemlock is a plant, and what other plants do we know of? Well, there's only one answer, CHARLEY!

Now, I know what you're thinking. I bet you're all about to go and reply, "NUH UH Planetobx, you are a dum dum, get off the internet now. Charley was a potted plant in Pheenix Wrong's office, how could he have did done been to do kill people out of the office??!" Well, the answer is simple. I have reason to believe that Charley is not just one unassuming house plant, but in fact, several plants across the world connected by a system of roots. Charley's roots actually go through the pot and into the ground, where they connect to these other plants. This is how Charley knows about everything that's going on, because he is quite simply everywhere. After all, there are plants everywhere, even in the most urban environments, and there aren't many places you can go where he wouldn't be able to hear you. This also explains why Vulper calls Hemlock "everyone and no one". He is "everyone" because his roots spread all across the globe, but "no one" because he isn't really human. And with all that knowledge at his disposal, he could easily pull off his crimes, which I will now discuss.

First, let's talk about Brisbane's assualt. I believe that Renwick Smith and Brisbane are actually part of some kind of weird demonic cult, and the two were meeting that night to discuss business. The envelope Detective Smith was carrying was actually some kind of ritual script that the group was meant to perform at their next meeting. However, when Renwick left, he forgot to take off the cult's signature outfit (a robe and white mask) which led to an awkward situation with the teacher whose name I forgot. After the meeting, Brisbane went onto Facebook or something and clicked a link that was supposed to be an article about "Perfecting Your Angry Shouting Technique", but it was actually a rickroll. In a fit of rage, Brisbane broke his mask into a million pieces, set his robe on fire, and threw his eye out the window, which is why the police couldn't find them. Once he had calmed down, Charley attacked. Since we know Brisbane was standing at the kitchenette at the time, he was right in range for Charley to strike, as the cactus on Brisbane's kitchen counter was actually connected to Charley. He tried to strangle him with a garrote wire (which was actually one of his vines) but failed because Charley is a stupid idiot, and then they had an epic battle, which Brisbane barely won, as he knocked Charley off the counter and killed him before Charley could finish him off. Then he made his 911 call, and blamed Renwick for the crime because he was the one who rickroll'd him. All in all, it was a big, stupid, pointless mess, but this is only ONE of Charley's crimes.

Next are the two murders discussed in what is indisputably the fourth best case in the game, Turnabout of the Snow. First is Cedric Maplethorpes' death. What happened here is fairly obvious. Maplethrorpe was standing in front of the cell window when Charley, who was probably a plant outside, reached through the bars and strangled him! Then he threw Maplethorpe at the dividing cell wall to place the blame on Vulper. So, that one was easy, but what about Perry Docks' murder? There weren't any plants in the interrogation room, and if there was a window with some grass outside, Docks likely never stood near it. Does that mean the theory has hit a brick wall? Of course not.

I believe that Perry Docks wasn't murdered at all. In fact, his death was the result of a tragic accident. The truth is that he thought Detective Snow was really suspicious (I mean, who wouldn't.?) so he went to his office in the hopes of discovering THE TRUTH. However, he bumped the wall a little and knocked Snow's stilleto dagger off the wall. He then bent backwards at a 90 degree angle to look up at it, and the knife plunged into his chest and killed him. I know it sounds incredibly stupid and implausible but it's not. So then Robert Snow went into his office to find the source of all the commotion, saw a dead guy, and was like "what." He then told Schaden Freude about it, and the two agreed that that was a really lame way to die, so they decided to set up a second murder and frame Vex Vulper for it, since they had heard about the Maplethorpe case and assumed he did it. So, Snow drove back home and grabbed one of his five identical stilleto knives and replaced the one that killed Docks with it, thus removing the traces of blood. Meanwhile, Freude went to the Interrogation Room and set up the evidence to frame Vulper for an attempted poisoning. Unfortunately, he goofed up and poured too much atronquinine into the coffee. Embarrassed by his mistake, he went back home and cried himself to sleep. Then, Robert Snow returned to the Interrogation Room with the body (Now that I think about it, I'm pretty sure Snow's Office and the Interrogation Room are in two different buildings, but I don't care.), placed it on the table, and stabbed the wound with Docks' knife. Then, he called Vex over for the interrogation, and with that, the plan was complete. It would have gone perfectly if Maggey Byrde didn't see Snow moving the body and arrest him, but in the end, Vulper got arrested for both crimes, as Charley had hoped.

We only know of one more person killed by Hemlock. That person is Blaine Chill. We don't know much about this case so it's hard to say for certain what happened here. We do know that he was garroted, and that the body was found in the reading room. Thus, there are two ways Charley could have committed this murder. The first is the most reasonable: Blaise was killed in another area with plants nearby, and then moved to the reading room. The second explanation is far stupider: One of the many books in the reading room was made out of paper that came from Charley. Since Charley is a network of many different plants, it makes sense that at least one of those plants would be a tree. If that three was turned into paper, then Charley might be able to control that paper like he could a plant. And if Blaise Chill went into that reading room looking for the next Captain Underpants book or something, all he'd need to do is pass by the right book, and then Charley could strike. As for the other "B" victims, they were probably killed in other forested areas. And what does the "B" stand for? It stands for "Bravo", Charley's first name! (Get it? It's like Alpha Bravo Charlie, the military alphabet. I'm so funny.)

However we're missing one thing we need to put the final nail in Charley's weird planty coffin thing: a motive. Now this is easy, Charley was a part of the Cohdopian Smuggling Ring, and the leader of Aculeus. This fact is all we need for a motive. But how did he get involved in the smuggling ring? Charley was one of Quercus Alba's passionflowers, and when he heard Quercus Alba doing smuggling ring work in his office, he offered to join. Quercus Alba was naturally confused when a flower started talking to him, but just assumed he drank too much coffee and started hallucinating and agreed with the flower to get it to shut up. Unfortunately for Alba, during the events of Turnabout Ablaze he decided to switch the statues by using the sticks holding some of his passionflowers as crossbow bolts. In order to do this, he uprooted Charley and threw him out of the window. Charley was filled with rage by Alba's betrayal, so he decided to forge evidence that would get Alba arrested (Most importantly, he forged the Samurai Dogs with the blood on them). When his plan succeeded and Alba was arrested, he took over the smuggling ring and renamed it Aculeus. After this Charley was filled with lots of angst, and he started killing people left and right! He killed most of the "B" victims for business reasons, but he killed Blaise Chill because he thought his name was stupid, killed Cedric Maplethorpe because he goofed up and shot Stan Nyph, and then beat the crud out of Erol Brisbane for the lolz. He was also pretty ticked off because Phoenix wasn't watering him enough, so he kills Miles Edgeworth for revenge in the second half. With that, the truth behind Hemlock, and the various murders he committed, has been revealed!

tl;dr Charley shot JFK.

Didn't Cardiovore straight up confirm that it was Maya?