I found the use of crowd sourcing in the Boston Marathon bombing case to be interesting and useful. I have taken notice in these postings that there seems to be concern about the government misusing the information or that its use is "big-brotherish." I think its important to note that in the US, we are presumed innocent until proven guilty and, as such, crowd sourcing is just another tool in the criminal justice process. Asking about someone in a photo is not a finding of guilt. If someone is wrongly identified as a person of interest, then it will be sorted out. Yes, it's an inconvenience for the person wrongly identified, but in this world of increasing violence, the possibility of being wrongly identified is price we may have to pay for the gains offered with crowd sourcing.