Very well done portrayal of a real case that took years to resolve.
At least they was some closure, apart from the poor family of one girl.
So often in these stories the perpetrator is never found, but improvement in technology and DNA sampling resulted in the right man coming to justice.
However, this doesn't make up for the poor soul who was the prime suspect for too long.
The way the actualities of the crimes were described rather than shown visually and the fact that these were not gratuitous was also a credit to the producers.
They told the story over two episodes and this helped illustrate the extraordinary length of time the case actually took.