anyone that finnished offline can help im stuck

im playing ep.2 offline

im on main mission called price of genocide 2 (2nd part of main mission) where u have to catch the boy that keeps running from u, i asume u have to trap him useing the doors and button but iv try every way i can think of going back and forth.

just cant trap him or do what ever needs to be done to get him

any help would be nice

thx