Rec From Retail Employer

[BroadwayMusicals]

I already have 2 recs from professors.  I was thinking about getting a third rec from my supervisor at work.  My job is along the lines of Staples / Office Max; I've been there for a year.  It seems that most of the employer recs that people submit are from professional jobs.  Something is telling me it would be immature to send a LOR from my supervisor at a retail store.  On the other hand, everyone says to use people who know you the best.  The supervisor knows me well and could add a more personal side that the academic letters are lacking.

Should I just send the 2 academic letters or ask the supervisor for a third one?

[I am Penny Lane]

My response on LORs is that it never hurts to ask. You can always decide not to use it. Who knows, your supervisor might let you read it and then you decision would be petty easy. If you do ask him/her it willl be important for your attributes that will be applicable to law school be emphasized.