Electronic advertising has gradually replaced printed ads and the internet is now a venue where murderers who employ a similar modus operandi can meet their victims; in Schecter's Encyclopedia, the entry for "Ads" mentions internet dating and the use of internet ads by the so-called "Internet Cannibal" Armin Meiwes.Since 2007, several accused and convicted killers have contacted victims through advertising services such as Craigslist, a popular classified advertising website.Robert Frederick Glass pleaded guilty to killing Lopatka and later died in prison while serving his sentence.In a case that might be regarded as a quasi-consensual homicide, "John," a teenage boy from Altrincham, England, allegedly tricked another teenager into killing him using long conversations in an online chatroom.The victims' deaths may result from a robbery or a sexual encounter that turned violent.Some of these perpetrators may not have intended to commit murder, but killed their victims during the course of a struggle or to prevent capture. Several legal and technology experts have questioned the idea that there is a phenomenon of "internet killings".For example, between 19, Hungarian serial killer Béla Kiss lured his 24 victims by using personal ads published in newspapers.
The suicide-by-homicide failed and on May 29, 2004 John pleaded guilty to inciting someone to murder him and was sentenced to three years supervision.
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.
In the list below, the victims' deaths may have been premeditated, especially if the perpetrator is a serial killer, but they may also have resulted from a robbery, insurance fraud, or a sexual encounter that turned violent.
The theme of internet homicide has proven popular in fiction, with examples seen in books, television shows, and movies, in a number of which the murderer is referred to as "the Internet Killer" by other characters.