This has been languishing on the pile for Way. Too. Long.
From the Blurb:
One year on and Pufferfish - aka Detective Inspector Franz Heineken - remains haunted by his failure to apprehend the killer of a young Hobart woman. Every time he sees a merchant vessel leaving the city's port he thinks of Angie, because that's how her murderer escaped. And that merchant seaman may still be coming and going with impunity, waiting for another opportunity.