Robert Frederick Glass pleaded guilty to killing Lopatka and later died in prison while serving his sentence.
Once means of transmitting payment were developed, phone sex turned into primarily a commercial activity, with customers (overwhelmingly male) and sellers (overwhelmingly female).
Due to the potential for emotional intimacy between those who have engaged in phone sex, it is a matter of some debate whether phone sex is to be considered infidelity when involving a person outside of a committed personal relationship.
These killers are sometimes referred to in the media as "Craigslist killers"; the first use of the term Craigslist killings may date to October 31, 2007, when the phrase appeared in a headline in the Saint Paul Pioneer Press in Minnesota, in reference to the murder of Katherine Olson by Michael John Anderson, who was then dubbed "the Craigslist killer".
Since 2007, several suspected and convicted perpetrators have met their victims or solicited murder through Craigslist.
Serial killers are murderers who target three or more victims sequentially, with a "cooling off" period between each murder, and whose motivation for killing is largely based on psychological gratification.
Such killers have used forms of social networking to attract victims long before the advent of the internet.Phone sex is a conversation between two or more people on the phone where one or more of the individuals is describing the act of sex.Phone sex takes imagination on both parties' part; virtual sex is difficult if the operator does not put the images in the head of the caller and the caller must be open to the pleasure as well.Nevertheless, phone sex should not be confused with prostitution wherein money is exchanged for real life sexual services or physical interactions.A key advantage of phone sex, compared with physical intimacy, is that it cannot transmit a sexually transmitted infection.Of those cases, two were convicted for crimes in the three-month period encompassing February to April 2009 and a further four were accused of crimes during the 13-month span of March 2008 through April 2009.