Hi I would appreciate any help anyone can give me with this.

About 6 years ago I was arrested on suspicion of a crime/

Was released morning after arrest- wasn't interviewed. Was asked to write to sincerely apologise to the complainant. Case was given NFA. At the time I was training to do a job working with vulnerable adults. A few months later finished my training and was offered a job. Was almost certain as it was so recent that it would come up as non conviction information on my enhanced DBS. Disclosed to my employer. Employer was fine with it- DBS came back with nothing on it.

Im now in the exact same position. Been offered another job which needs an enhanced DBS. I Have taken the job, disclosed to my employer, he said 'it will be fine.' 

However, I am particularly concerned about the potential scenario of the police assessing the information and then decided to reinvestigating the crime. I have spoken to a solicitor who advised that the chances of this happening are remote- he said has seen it happen once in ten years of practice but that was for a particularly serious crime. However I can't stop worrying about it, to the extent I'm now thinking of turning the job down (due to start in a week or so) just to cancel the DBS process to prevent this scenario from happening. Can anyone tell me how likely this is to happen? Thanks in advance.