使用的名称的个人20岁的宾夕法尼亚男子一位知情人士告诉美国广播公司新闻，试图暗杀前总统唐纳德·特朗普的人在网上报名参加7月6日在宾夕法尼亚州巴特勒举行的特朗普集会。
该消息人士称，该用户使用一个加密的电子邮件地址和一个手机号码注册。
据消息人士称，在特朗普竞选团队于7月3日公开宣布集会将于7月13日举行的三天后，使用电子邮件和手机的个人在网上注册。
联邦当局表示，托马斯·马修·克鲁克斯(Thomas Matthew Crooks)在周六的集会上试图暗杀特朗普。一名集会参与者也在袭击中丧生。
官员们说，最终，嫌疑人开枪的那栋大楼位于安全周界之外，但距离特朗普发表讲话的讲台不到400英尺。
美国广播公司新闻网(ABC News)此前报道称，据消息人士透露，嫌疑人克鲁克斯在他的手机上搜索了总统乔·拜登(Joe Biden)和前总统特朗普(Trump)的图像，并搜索了特朗普在巴特勒举行集会的日期和民主党全国代表大会在芝加哥举行的日期。
电话搜索记录没有显示克鲁克斯的政治观点，调查人员仍在试图确定他的动机。
这暗杀企图的动机根据简报者的说法，这仍然是一个谜，他们没有发现特朗普和/或拜登有任何意识形态上的联系。
一位消息人士称，美国联邦调查局告诉立法者，作为调查的一部分，他们已经进行了200次采访。
美国联邦调查局发言人没有回复ABC新闻寻求置评的电子邮件。
Trump shooter signed up online to attend rally a week before shooting: Source
An individual using the name of the20-year-old Pennsylvania manwho attempted to assassinate former President Donald Trump signed up online to attend the Butler, Pennsylvania, Trump rally on July 6, a week before the shooting, a source familiar with the matter tells ABC News.
The individual signed up using an encrypted email address and a cell phone number, the source said.
Three days after the Trump campaign publicly announced on July 3rd that the rally would take place on July 13, the individual using the email and cell phone signed up online, according to the source.
Federal authorities say Thomas Matthew Crooks shot Trump in the ear in an assassination attempt at the rally on Saturday. A rally attendee was also killed in the attack.
Ultimately, the building the suspect fired from was outside the security perimeter but was fewer than 400 feet from the podium where Trump was speaking, officials said.
ABC News previously reported that the suspect, Crooks, searched on his phone for images of President Joe Biden and former President Trump, and searched for the dates of Trump’s rally in Butler and the dates of the Democratic National Convention in Chicago, according to sources.
The phone search history revealed no indication of Crooks’ political views, and investigators were still trying to determine his motive.
Themotive for the assassination attemptremains a mystery, according to the briefers, and they have not identified any ideological nexus to Trump and/or Biden.
The FBI told lawmakers they've conducted 200 interviews as part of the investigation, a source said.
An FBI spokesman did not respond to an email from ABC News seeking comment.
