Takayuki Yagami isn't the only detective operating in Yokohama: The star of Lost Judgment has a rival to contend with when he arrives in the Ijincho. A corrupt detective has set up shop, selling services that are less than legal to unscrupulous clients and causing havoc in the process. It's up to Yagami to stop this dark detective before he drags the reputation of his profession down with him, and finding the culprit takes place across a series of missions that'll put your gadgets and observation skills to the test.

Below, we've run through each step of the Dastardly Detective case to help you solve this especially involved mystery, although note that this guide contains some slight spoilers for the case, so don't read on if you want to solve it and uncover the culprit's identity on your own.

We've got even more Lost Judgment coverage to help you in Yagami's quest, as well. Check out our guides for quickly earning SP and getting fast cash, as well as our rundown of where you can find all the game's Kappa statues. You might also want to read our Lost Judgment review.