“Google’s arms are usually not tied, and it has a duty to behave,” he wrote.

In an electronic mail to The Instances, Lara Levin, a spokeswoman for Google, declined to touch upon the investigation or the senator’s letter.

Mr. Blumenthal made the identical case in his letter to Microsoft, writing to the corporate’s chief government, Satya Nadella, and its president, Brad Smith. The Microsoft consultant declined to make any extra remark.

The operators of the suicide website have lengthy used Cloudflare, an American agency that gives cyberprotections, to obscure the names of its net host, making it tough or not possible to know what firm is offering these companies.

In 2019, Cloudflare was notified of the risks of the suicide web site by Australian authorities officers. The subsequent 12 months, dad and mom whose kids had died whereas taking part within the website requested Matthew Prince, Cloudflare’s chief government, to cease offering its companies to the positioning, however he didn’t reply. Cloudflare declined to reply to a request for remark for this text.

The 2 males who began the positioning, utilizing the web names Marquis and Serge, had tried to cover their true identities. However utilizing area registration information and invoices, monetary paperwork, different on-line exercise, courtroom information and interviews, The Instances revealed that they’re Lamarcus Small, 28, of Huntsville, Ala., and Diego Joaquín Galante, 29, of Montevideo, Uruguay.

Mr. Small denied any involvement with the positioning. Mr. Galante acknowledged in an electronic mail that he had posted on the positioning as Serge, however denied that he was a founder or an operator of it.

After the article was printed, on Dec. 9, Marquis introduced on the positioning that he was resigning as an administrator, completely deleting his account and turning over operation of the positioning to somebody utilizing the web identify RainAndSadness.