So obviously I don't own Riverdale. This story is Au and I'm not entirely sure when it's set, as toni and Cheryl are together, but I'm still only half way through season 2. Also, I'm British, so sorry if there is any British things that don't make sense. Please review.
It was later that week, in the hub of serpent activity, that Toni and Cheryl came up with a plan. "we have to find out who did it" Cheryl said. Toni nodded in agreement. "normally the four idiots would do it, but since it's 2 of their parents, I think we should." Cheryl said. "hey, Jughead isn't an idiot." Toni said.
Together, they went to the murder scene. The bodies had been found, with Hermione lying down, and Fred on the sofa. The police were certain it was poison. The bodies had been cleared, and the police had finished with the room, so Toni and Cheryl could enter.
The house was a small one, just outside of Riverdale, by the river. It was a cottage, and it was quite old. The house had been abandoned, though there was a bed, and sofas and it looked like the kind of place that the occasional more daring students would sneak off to have a shag.
Toni and Cheryl went in. It was cold. They looked around a bit. "toni, can you think of anyone who would have motivation?" Cheryl asked. A slight cough could be heard behind them. Veronica and Jughead stood behind them.
"isn't it obvious?" Veronica said. "my father of course. Hermione was having an affair with Fred. He probably had someone lure then here and killed them." Jughead placed a gentle hand on Veronica's arm.
"where is Betty and Archie?" Cheryl asked. "there not off kissing are they?" Veronica scowled. "Cheryl!" she said, in annoyance. "no. No. That was a one off mistake for both of them." Jughead said.
"let's investigate here" Jughead said. They began looking around. Cheryl noticed a journal, under the sofa. She pocketed it quickly, before anyone else could see. Cheryl wasn't sure why really, but after Jason's murder, Cheryl had realized that no one could be trusted when it came to a murder investigation.
Then Veronica's phone began to ring. She picked it up. It was Hiram lodge. "Veronica, darling. Remember I love you. I'm in the house hiding, I can't get out, and I think she's here... I know who killed Fred and Hermione, Ronnie, it was -" a slight gasp of shock, a cupboard door opening, and a wet thud cut the rest of the words off.
The group rapidly headed back into riverdale, calling the police as they went.
It was no good. By the following day, Hiram lodge was dead, Veronica an orphan, and no one had any clues to whom the murderer was.
Apart from Cheryl and the notebook. She read through it. The facts fitted. A motivation. Fred and Hermione had witnessed the suspect having sex with Hiram lodge. She had killed them to silence them, and perhaps Hiram had threatened to say, or perhaps the suspect had been wary of anyone who knew.
Cheryl phoned Toni. "toni, I know who it was." she told Toni everything. "but there is no proof. We must gather them all, and reveal it, like in a poirot novel." toni said. Cheryl agreed. Get them all there."