Sandra Taggert, (Formerly Sandra Fallon) is Mal Fallon's ex-wife. They were going through a divorce after her infidelity with one of her co-workers at Christmas. Mal confessed this to Natara during the Maskmaker case in Volume 1. She was introduced during 'The Root Of All Evil, Part 1 (V5,C5)' following the death of a wealthy donator to the charity she works with, however despite it looking like a suicide it was later revealed he was murdered by three of his children who conspired to kill him for money.
She also appeared breifly in 'And On The Surface Die' (V8,C8) and in 'Kai Hard' as a hostage to Nemisis. She pointed out during this side story that whenever Mal or his friends turn up somewhere, there is always trouble.