Drawing together all the previous chapters, Chapter 6 explicates the ways in which forensic linguistics can continue to provide support to the work of undercover online officers. Breaking down traditional constraints that have seen the work of the forensic linguist in this area limited to authorship analysis tasks, we sustain the argument here that we can usefully contribute to the strategy of authorship synthesis. While there is enormous potential for linguistic contributions to these policing tasks of identity assumption and infiltration, there are, of course, limitations. Both are discussed in detail in this chapter.