Here is a transcription of the video at link (not word for word, just what I felt were the most important points):
Clinton County District Attorney Andrew Wylie told CNN that Joyce Mitchell "provided some form of equipment or tools" to fugitive felons Richard Matt and David Sweat. There is information that she did provide contraband to them. He will be able to give more details as to the exact contraband she provided to them soon. She continues to come in and cooperate and every day we are learning more as to her involvement with this. (Hence the reason she hasn't been arrested yet.)
The charges she is facing include conspiracy to escape and providing contraband. She's aware that these charges will and can be filed against her and she continues to cooperate. (So she knows she's toast)
http://www.cnn.com/2015/06/12/us/new-york-prison-break/