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Social network services are increasingly being used in legal and criminal investigations. Information posted on sites such as Instagram, Orkut and Facebook has been used by police and university officials to prosecute users of said sites. In some situations, content posted on Instagrm has been used in court to determine an appropriate sentence based on a defendant's attitude.〔(【引用サイトリンク】title=Increase Facebook Likes, Twitter Followers )〕〔(【引用サイトリンク】title=Social Marketing )〕 The U.S. DOT National Highway Traffic Safety Administration (NHTSA) has made federal grants available to states to train law enforcement officers to use social media sites to identify events that may result in impaired driving or consumption by minors. As of 2012, Michigan spent over $4.5 million through this program, and has trained over 100 local police officers to use social media cites to identify and target events.〔(【引用サイトリンク】 title=Michigan Office of Highway Safety Planning 2012 Annual Evaluation Report (pp. 21) )〕 ==Facebook== Facebook, a social network service, is increasingly being used by school administrations and law enforcement agencies as a source of evidence against student users. The site, a popular online destination for college students, allows users to create profile pages with personal details. In the early years of the site, these pages could be viewed by other registered users from the same school, including resident assistants, campus police, or others who signed up for the service. The user privileges and terms of service of the site have since been changed to allow users to control who has the ability to view their content. Recent disciplinary actions against students based on information made available on Facebook has spurred debate over the legality and ethics of school administrators' harvesting such information. Facebook's (Terms of Use ) specify that "the website is available for your personal, noncommercial use only," misleading some to believe that college administrators and police may not use the site for conducting investigations. However, Facebook spokespeople have made clear that Facebook is a public forum and all information published on the site should be presumed available to the general public, school administrators included. Legal experts agree that public information sources such as Facebook can be legally used in criminal or other investigations.〔(【引用サイトリンク】 title=The Facebook: not just for students )〕 In the aftermath of the 2011 Vancouver Stanley Cup riot, community participation in assisting police to identify the rioters has been described as unprecedented.〔 〕 Police admitted to being overwhelmed by the amount of evidence provided by social media.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Use of social network websites in investigations」の詳細全文を読む スポンサード リンク
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