No, no, no. If you read his statement "no resistance on latch," that says no drilling or locksmith will suffice. Its a MECHANISM problem that the lock is detached from (key wont work). Therefore it stands to reason that boring a 1" dia. hole will do little but perhaps let you view the broken mechanism. Seek first any advise from the DEALER. If the mechanics wont give you free advice, the Dealer Parts Dept. usually will. They may tell you a common part has worn out, etc. They will usually tell you well known, symptomatic problems with various vehicles based on mechanics requesting related parts, hence free advice.
If all else fails this is what I would do:
1. Strip out with a heavy wire stripper or utility knife the plastic sheath on the wire, right where it goes into the trunk section. Strip off about 1-2 inches. Then with pliers, hand pull that section. If it was broken near the pull lever, then this will intercept that break. If that fails,
2. Youll have to get real mean. This may mean tearing out the seat backrest as methodically as permissible. Then with a drill and a jigsaw or reciprocating saw, cut out three sides of a 1-foot square section of the panel to the trunk area. Inspect the lock with a flashlight and coat hangar or other metal to force the lock from the inside, or otherwise pull on any attached cables therein.
One of these many suggestions should get you further along than drilling locks or locksmith. Finally once you have determined the cause(s) of the problem, take action(s) that prevent it from ever happening again. Good luck!