I am a supervisor with a staff of 15. At any one time there are 5/6 staff on duty. One of the staff has recently returned from a long period of absence. Since returning she is not pulling her weight, but only when I'm not there to see it. She is being careful to be seen to be working normally when I am there.
There were a number of issues which came to light whilst this person was away - things I had previously been unaware of - regarding duties she was not carrying out, confidentiality, general attitude towards other staff.
The other staff are becoming very unhappy (understandably so). However, as I am only aware of these things because they are telling me, not because I actually witness it myself, how do I go about resolving it without dropping them in it? Any help or suggestions are very welcome!