Who am I?

I am or I was, Danette Baltzer, special agent for a highly specialized government agency. Only they didn't call me that when I was in the agency. I had a different name then, one more homogenous to the rest of my... co-workers.  I was a special special agent from a special organization. Active in the field- I dressed in my nice work suit, shoes polished, collar properly laid. I taught seminars and helped the newby incomers become orientated. I wrote in defense of the agency, took special classes that would advance me up the ladder. I was on the fast track. Until that one day...

That day dawned dark. I had no clue how dark it would be until I woke up some days (weeks? months?) later to find the sun blinding me. They told me I had killed someone and as my memories flooded back, I grasped the full realization of what I had done. I had indeed killed someone...

but that is a story for another day. 
All you asked was to know who I am. 
   
So who are you?