If that L consulted with you, and got confidential info, he'd be conflicted out and barred from being adverse to you, whether you hired him or not (regardless of a retainer). Check into that with your L.
Nomo
M 39 W 39 M'd 10 yrs; T 14 yrs S7 D4 Bomb 5-8-05 W not working on M 1-22-07; EA 2-22 DB 4-10 S 6-11 No more C Link