DW missing Au

(Dint listen to the voice please)So, Shelly has gone missing for a few days, everyone doesn't even care because of how much they have ignored her to the point forgetting her, well except for Astro, Goob, Scraps, Tisha, snd Teagen, also Sprout, in this Au, Sprout is an overprotective freind, kinda like a yandere but doesn't love the one he likes, just overprotective, Sprout saw Shelly tslking with Cosmo, a misunderstanding arise, Sprout thought Cosmo was gonna replace him so he killed Shelly, her remains are in the trash bags that he hides at the very back of his house, its uo to you to solve the mystery....... detective.......