Mental Health Support

diagnosis of Asperger's syndrome, may exhibit hypervigilance.
Though not paranoid, this person may be described as extra-sensitive, physically and emotionally.
The person has all manner of meds for anxieties and sleeplessness.

My reading re Asperger's indicates that high attention to detail is part of Asperger's.
In the case with which I'm familiar, detailed memories are present, though some are false memories, which would be understandable in a hyper sensitive person, as their interpretation of events may be somewhat skewed from the average person's interpretation.