Jimmy Jojo is the mayor of Potty Lane and also the owner of "Jojo's Asylum". He was a suspect in the murder of Holly Westminster in Plot Hole. He also appeared in a cameo in Burning Rivers.
Burning Rivers (Case #9 of Parinaita; Cameo)
Plot Hole (Case #14 of Parinaita)
Motive to Madness (Case #15 of Parinaita)
The Burning Truth (Case #17 of Parinaita)
Kill Switch (Case #18 of Parinaita)
Visual Death (Case #21 of Parinaita; Mentioned)