I have been told it is possible to trigger my LCC D/A left handed, but it does not strike me as easy. The bolster release requires a fair bit of pressure, from a thumb. I think a finger may struggle and as a LEO do you want to be struggling in a 'situation'? Its fine for the collector or the 'KnifeKnut wanabee', but I would not advise you consider it. Thats just my opinion mind, I just don't want to be involved in offering advice and find out later you got hurt or killed because I told you it would be fine.
I have heard from people who have fired the action over 4000 times, no problems. Mine has had about 500 and it is perfect.
While I understand you desire to own the D/A and the hidden bolster, I would visit a shop and have a good long play with it. I would not risk it myself however, it is an AMAZING knife for us righty's however.
I don't know about the other blades, but I would look at all the options first. Is there a particular reason why you need an auto? I got one for the 'toy' factor and as it is a normal knife is other ways (D/A), also I wanted an LCC, so it seemed natural to me. I can open my Spyderco knives just as quickly as my LCC D/A. While I have tried to get my LCC to fire by accident, it won't. I even made the mistake of dropping it 3 feet to a hard floor, all that happened was the blade opened about 2 inches (the ball detent is a little weak in holding the knife shut, probably as a result of it being an auto). The LCC did NOT fire. Repeated knocks and bangs have never caused this knife to fire for me. I am just about happy to carry it now clipped to my pocket rather than in the pouch. While I have no worries about the stability and reliability of this knife and the fit and finish are amazing (no damage from the drop at all) I would carry a Spyderco model knife in your job, with a manual it is one less thing to worry about. You may need a knife to save your life, it is unlikely I will ever been in that possition. Hope you don't think I am trying to tell you what to do and I realise you must have considered this already. Hope I have helped in a small way.