Student or Learner
Senior security adviser Mansour Dhao was in tow, he told Human Rights Watch, as well as Gadhafi's personal guard, driver and a bunch of other bodyguards.
Source:Rights group recounts Gadhafi's last bloody moments, calls for justice - CNN.com
Is it tow or town?
Picture a truck towing another vehicle. The other vehicle is right behind the first.
In this case, the person is right behind (or simply very near) the first.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.