Criminals often set up fake identities on dating and social networking sites, using stolen photographs (of models or army officers) and pretend to develop a romantic relationship with their victim.
http://ummid.com/news/2011/September/28.09.2011/online_romance_scam.htm
http://ummid.com/news/2011/September/28.09.2011/online_romance_scam.htm