One day, I will stop thinking of crazy plots for my fandoms . . . one day.

So, my love of the Chicago and L&O: SVU shows kind of exploded towards the end of summer when on my days off of work, I would watch them while I worked on my computer and my family watched it, so I got hooked. Thus, here I am, mixing them with Marvel, of all things. But if you're dropping by and think this looks interesting, please tell me what you think! If you would like a full summary, you can view this story on Wattpad and Ao3.

Disclaimer: I do not own Chicago Fire, Chicago P.D., Chicago Med, or Law & Order: SVU. They belong to Dick Wolf, Derek Haas, Michael Brandt, and other creators of the shows.

Sonny Carisi

In a normal situation, he would love having the thrill of a case like this. Someone who, without having the right resources at the right time, would go completely free. Someone who was the perfect target for him and the men and woman he considered his brothers and sister in all but blood.

It was different when this was an extremely personal case. It was different when this suspect terrified his lieutenant. It was different because he was working solo to make a tough call on a high-profile man that would draw attention to him, and how he worked, immediately.

The conversation occurring in the room behind him while he listened to it on his phone, however, sold him.

"Whose side are you on?"

"Not Rob Miller's."

"Doesn't look that way."

"You accusing me of something?"

"I'm just asking. I know that Rob Miller is guilty."

"How?"

"How?! Because he had unis pick up my son from his school! He was clearly threatening me. He looked me in the eye and he told me to drop the case!"

That was strike one, but he kept listening anyway. "When were you gonna tell me this?!"

"That's irrelevant to the investigation."

"Olivia, it is completely relevant to the investigation! He's threatening Noah. Anything you find out, his lawyer will claim you have a personal vendetta against him."

Strike two, and Olivia kept talking. "Peter, I'm worried that he's going to hurt my son. Rob Miller is a criminal, Peter. He's a rapist, he's a murderer, and we got nothing. And he's gonna get away with all of this."

Strike three, Sonny thought darkly as he put his cell phone down, looking around to see if Fin or Amanda were anywhere near him. Neither of them were, so Sonny made it look like he hadn't heard a single word of what was said when Olivia's door opened. "Everything all right, Counselor?" he asked.

Peter shook his head, looking frustrated. "Not a thing, Carisi."

Sonny watched him leave the precinct, then peered into Olivia's office as best he could with the blinds in place. "No kidding," he mumbled under his breath when he saw his lieutenant on her couch, head in her hands.

He swiveled in his chair to look at the corkboard they had detailing Rob Miller and his actions. He was guilty, that much was clear to the entire team. But he was a man with too many contacts that made him a free man, and he had a way to fight against Olivia . . . and that was through her son.

Sonny turned back to his computer, already settling into another mode. This is ending tonight.

Sonny Carisi

He kept the lights off after he had found everything he needed in the house, choosing to tuck himself back into where the staircase curved up towards the next level. He heard the key click in the lock, heard the creak of the door open, then closed his eyes to prepare for the lights turning on. He quietly tapped his fingers against the wall, silently watching his target walk past him towards the living room, allowing himself to smirk when the other man stopped in his tracks, seeing what was wrong. "What?" he hissed, walking over to the coffee table where various spreadsheets were printed out.

"If you were smart, Mr. Miller," Sonny finally made himself known, and Rob started, looking up at him with wide eyes, "you wouldn't have kept those spreadsheets on your computer. You should have deleted them when you had the chance." He raised an eyebrow, stepping forward and casually leaning on the staircase rail, pointing at the spreadsheets. "Or were you updating them as you found out more about Lieutenant Benson's schedule?"

"Detective Carisi," Rob narrowed his eyes, stepping forward.

"And Detective Rollins'?" Sonny continued, raising his other hand to place it over his right, and Rob stiffened when he saw the handgun with a silencer that was in his left hand. He slowly looked back to meet Sonny's eyes, the detective's cold as ice. "You were planning on getting to Rollins as well. Jesse and Billie? You really have a death wish, don't you?"

Rob narrowed his eyes. "It's you who does, Detective," he said lowly, and Sonny raised an eyebrow. "People that screw with me typically don't have happy endings. They get endings I want, endings I control."

"Do you?" Sonny smirked, then pointed with his gun. "You didn't see what else I had printed off, did you?" Rob frowned uneasily, then moved the papers aside, and his eyes widened when he saw what was underneath. "Endings you control? All of that is all the money you distributed to pay others off. Judges, witnesses. Paying for their silence, paying for your freedom." He clicked his tongue, moving away from the staircase, running gloved fingers over the silencer on his gun. "I wonder how much control you'll have once that's in the hands of the police."

"Are you threatening me, Detective?" Rob growled.

"Oh, you think that's a threat?" Sonny snorted. "No, it's not a threat. It's a promise. That – all of that – is going to the police."

"I'll have your badge!" Rob snarled, storming forward. "You're breaking the law by doing this!"

He froze when Sonny aimed right at him. "Throughout the years I've made marks like this, I've learned sometimes the law lets people like you slip through their fingers," he said quietly. "You hit every mark I can think of. You can pay people off to make sure you go free. You're someone with so much influence, you can pay the courts to make sure there isn't a scratch on you, and they would look the other way if you tried something like with Lindsay Parker again. But what made me decide to do this for certain? Was when you became a personal threat to Lieutenant Benson and to her son. I knew what I was going to do with you the moment I knew that. When I saw Amanda, Jesse, and Billie were the next three you were going to try and intimidate?" He looked at his gun, then slid it into its holster. "I changed my mind."

Rob slowly started to smirk. "Good choice."

"I agree," Sonny nodded, walking forward. "The best way to slaughter a lamb isn't with a gun."

Rob's eyes flew open wider, and he made to run, but Sonny was quicker, stepping in front of him and using his right hand to bury a military knife in his throat. Rob choked violently as he was forced back against the wall, reaching up to grab at the blade in his neck, blood spurting from his lips and from sliced veins. "You – " he rasped hoarsely.

"That's what you deserve," Sonny sneered, thrusting the knife deeper so it buried into the wall. "An animal staked to the wall." He stepped back, watching Rob's blood trickle out. "Because no one threatens my family or the people I love and gets to live after what you've done."

The life finally flickered out of Rob's eyes, and Sonny turned back to the papers on the table, looking them over. A satisfied smirk crossed his face; there was enough in the pile to ruin his reputation a hundred times over. He took one last look at Rob's body as he reached into his coat pocket, finding what he wanted.

"That's why you don't mess with a King," he couldn't help but chuckle, tossing the playing card with the King of Clubs at Rob's feet, turning and heading down the hall towards the window he'd entered through. "We have too much to lose. It's why we make sure that under any circumstances, we never do."

Olivia, Noah, Amanda, Jesse, and Billie were safe, and whatever Peter had been cooking up in his mind to go after Rob would never have to be used. His team, his family, was safe, and that was what mattered.

He was rather looking forward to work the next morning.

A/N: So, if you look at this story on one of the sites mentioned above, you would see some characters included that are no longer around for the current (2019-2020) seasons. The first part of the book or so will explain it - in fact, this part basically explains how Peter sticks around.

But to also give the overall idea of the story: the first part will establish how the Chicago/SVU universe connects to the MCU (hint, you've already seen one person who does) and will delve into how that happened, why they are where they are now, and why they do what they do, so there will be lots of Chicago/SVU content before really digging into the MCU part of the story.

If you think this is interesting enough to stay tuned into, great! If not, I certainly won't hold this against you. What am I thinking, crossing these fandoms over? Honestly, I'm still asking that myself. Still, it's a story I've loved starting, and I'm happy to finally post it here, so I'm hoping at least a few readers drop in to investigate.