Dollhouse canon question

[snick_backup]

Opinion needed: how long had Topher been held captive in Neuropolis when Paul and Echo bust in to get him out? Ever since the 'thoughtpocalypse' began, or had he been at Safe Haven for quite a while before he'd been nabbed? I always figured the latter, since girl!Caroline says that the Safe Haven folk raid Neuropolis for tech on a regular basis - surely if Topher'd been there long, they'd have gotten him out sooner?