The lovely wife and I were scouting for a nice place to hide a new cache, when we suddenly found ourselves surrounded by quite a few very suspicious looking characters. Some looked positively evil, while others appeared to be little more than hooligans -- but I must confess that there was something strange and unsettling about them. I was so surprised at the sudden confrontation that as we turned to flee, I stumbled and dropped the cache I was carrying! We managed to escape, but when I went back later to look for my cache, it was gone! Ironically, it appears that the scoundrels who pursued me grabbed the cache and hid it themselves! Hopefully, you'll be able to track it down after identifying the suspects in this lineup.
Naturally, please make sure that YOU remain a law abiding citizen while searching for the cache. Good luck!
ACROSS
3. 
(2 words)
5. 
(2 words)
8. 
(2 words)
9. 
(2 words)
11. 
(1 word)
13. 
(3 words)
14. 
(2 words)
15. 
(2 words)
DOWN
1. 
(3 words)
2. 
(1 word)
4. 
(1 word)
5. 
(2 words)
6. 
(2 words)
7. 
(1 word)
10. 
(1 word)
12. 
(2 words)
Now, convert the needed letters (see below) to their numeric equivalents (A=1, B=2, ... Z=26), and perform these simple calculations to solve for the actual coordinates.
Example:
[A5,7] refers to the 7th letter of the word in #5 Across.
[D2,3] refers to the 3rd letter of the word in #2 Down.
A = [D2,3] - [A14,8]
B = [D4,3] - [A11,2]
C = [A15,5] - [D6,7]
D = [A13,10] - [A8,7]
E = [D12,2] - [A9,10]
F = [D1,13] - [A5,7]
G = [D5,3] - [A3,11]
H = [D10,2] - [D7,3]
The cache is located at N37° 4A.BCD W121° 5E.FGH.
CHECKSUM: A+B+C+D+E+F+G+H = 36
Please be stealthy while you retrieve and replace the cache!
