#like yes he pursues the truth but like. he's a detective that falsifies alibis and evidence to get to the truth!

[protect-namine]

so as of trial 5, here's the number of times people knew shuichi lied in the trials:

kokichi: probably every time tbh. he played along in trial 2 when kirumi was being implicated (because he also, by then, figured out kirumi was sabotaging the trial). he starts poking fun at shuichi by trial 4 then eventually gets pissed off (though tbh I think he was more so mad at gonta and shuichi's lying just tipped him over from annoyed to really mad). but he pretty much let shuichi do whatever he wanted for the other trials.

maki: 3x. the first time was when shuichi faked an alibi for her in trial 2. the second time was and when he lied about tenko dying immediately in trial 3, which maki would know because she's the one who told shuichi that tenko's death wasn't instant. interestingly, maki corroborates shuichi's lie to kokichi when asked, and kokichi was just like "¯\_(ツ)_/¯ mmmkay sure whatever you say." the third time, he says in trial 5 that there's no lock in the cockpit of the exisals, which again maki would know because she piloted one of those things herself. but to be fair, she was also lying about not using an exisal in the first place.

kaito: 1x. he helps corroborate shuichi's lie about maki having an alibi in trial 2.

keebo: 1x. shuichi lied about keebo not being able to see through his flashlight function lol. it was a pretty bad lie. keebo was flustered and just said he didn't remember anything.

kaede: 1x. shuichi tries to steer the class away from kaede once in trial 1.

I'm not counting any of his lies involving himiko since none of them seemed effective lol and they always make it seem like shuichi was just humoring the supernatural options rather than outright lying or falsifying evidence, unlike the rest of the time where he actually does make up alibis and fake facts to steer the case along. so when himiko is the target of shuichi's lies, it never seems like he's lying to or about her.

there was also a lie in trial 5 where it comes off more as "wishful thinking" than an actual lie, so I don't think kaito would have caught it as a lie.

so to conclude, kokichi and maki both have the most experience and knowledge of shuichi being a lying liar who lies.