Majima would want to capture Lamar and get whatever info they can out of him for sure. He'd be more on the 'get that info now' side than tossing him in a cell and waiting a bit first -- I mean what if the dude tries to kill himself or someone murders him to keep him from talking, that would totally suck...

He'd be all up for mind reading, but whatever happens he'll want to snap a photo of lamar for safekeeping; I mean dude is supposed to be super old, so this 20something obviously doesn't match the description.

He's ambivalent about jail, so if that's the best option available he'll roll with that.