[@KatherineWinter]Recent memories would only take a few seconds, older memories would take proportionally longer to locate wand 'watch', but if they need to go that deep in a person's memory they'll probably be in custody already.


I considered giving them the ability to induce a hypnotic state to prevent reaction when he's combing through memories but figure that's a touch overkill. Thinking about it now though it could be useful to help balance things out.

As for an excuse to touch them, a handshake would do it for brand new memories that are still on the surface.

As for duration, I've met a lot of cops (police family) and it's not uncommon for them (detectives in particular) to prolong a handshake while they try to get a feel for someone. Alternatively, have him 'arrest' suspects, put them in cuffs, gives him a prolonged period to work in.