An attempt to provide some answers by a post-grad LE student, before the Newtown murders; 'Analytical Method for The Identification of Lone Wolf Terrorist', just over ninety pgs, double-spaced and it can be downloaded from:http://papers.ssrn.com/sol3/papers.c...act_id=2041939

From the Abstract:
A case study approach is used to explore and reveal common themes across three different incidents of lone wolf attacks. The research results revealed what has been termed as rhetoric shifts that act as markers in the evolution of a lone wolf terrorist. Based on the results of case study, an analytical method is explored and proposed for the identification of lone wolf terrorist from within the broader population they exist
On my first read it is interesting, although without direction and resources (including training and data-sharing) it is easy to see this approach floundering. At least the author has tried, which makes his paper of value.

The shorter version is:
The Newtown school shooting has re-awakened debates not only on gun control and mental illness, but also on the role of law enforcement in detecting and eliminating emerging threats. Quietly emerging is a solution that means not more guns, but more militarization.
Link to an article:http://www.opendemocracy.net/opensec...st-911-america

The author, now in the private sector, has a short bio on:http://www.pennassoc.com/OwnerAndFounder/index.html