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CHAPTER 15
Social media and its role for LEAs:
Review and applications
(
Luther et al., 2009
),
Sense.us
(
Heer et al., 2007
) and Many Eyes (
Viegas et al.,
2007
), that are used for the analysis of crowd-sourced information. Platforms such
as Ushahidi (
http://www.ushahidi.com/
) and Google crisis maps (
http://www.
google.org/crisisresponse/
) are already used to crowd-source information in di-
saster response situations. Crowdsafe (
Shah et al., 2011
), a mobile application that
allows users to input crime data to help identify hotspots also helps users to plot
routes home that avoid them. As well as using crowd-sourcing
to coordinate the
relief effort, LEAs may also wish to crowd-source information during and after
a crisis event to provide both situational awareness and to piece together the true
nature of the events, as trawling manually through this data is nigh on impossible.
Involving LEAs in the crowd-sourcing loop is also necessary but,
as the Boston
Bombings in 2013 showed; crowd-sourced, public data alone does not necessarily
lead to the correct investigative conclusions (
Lee, 2013
).
Similar to crowd-sourcing, collective intelligence (
Bonabeau, 2009
) is the result
of the collective and collaborative efforts of a number
of people with a common aim
or goal. A collective intelligence platform combines data from a number of different
sources (e.g., open-source intelligence repositories). Data received through crowd-
sourcing appeals via social media and closed data that is not exposed to the public is
then combined with the domain-specific knowledge of LEA officers, domain experts
and analysts
in order to produce actions, outcomes, or knowledge building blocks.
The results of these analyses may go back out into the public domain to refine and
re-organize the actions of scenario stakeholders based on the intelligence provided
by LEAs. This type of platform would not only be useful in a crisis management situ-
ation but also to track events such as organized
crime involving arms trading, drug
trafficking, and money laundering gangs (see Chapters 3 and 10).
A number of technologies can be utilized and integrated within a collective intel-
ligence platform. Formal Concept Analysis is one such example of this and may be
used for the analysis of data generated by social media that is potentially related to
criminal incidents.
In FCA an object can usually only be placed at a certain hierarchy level if it
contains all the attributes that are present at that given level.
When analyzing textual
data in particular, the wide range of expressions someone can use to explain exactly
the same situation is problematic. Two potential ways of tackling this problem are
to use a lexical database such as Wordnet (
Miller, 1995
) to map synonyms for each
of the attributes and the second is to introduce fault tolerance for FCA. That is to
accept objects at a particular level of the hierarchy even if they do not match all the
attributes but match a number of them beyond a predefined threshold.
This prevents
near misses slipping through FCA's metaphorical net. This means the collective in-
telligence platform can be refined as more information is added and further analytical
techniques such as machine learning, clustering and additional classification can also
be applied to further enhance and refine the results.
The dynamics of a crisis situation mean that events can change rapidly. Example
technologies such as FCA could mean a constant re-evaluation
of the number of
objects appearing at different positions in the hierarchy and the introduction of new