伊利诺伊州斯普林菲尔德联邦法院周一公布的一份刑事起诉书显示，一名男子被指控向四名国会议员发送含有白色颗粒物质的信件，结果证明这是盐。
据称他听说了关于其他带有可疑物质的信件法庭文件称，这些信件将被寄给全国各地的参议员和国务卿。
根据司法部的说法，Matthew Unglesbee据称将这些信寄给了伊利诺伊州北区的四名国会议员，包括一名美国参议员的办公室。
诉状称，在一名众议院议员的办公室里，寄出的信感觉像是含有粉末物质，结果是盐。根据诉状，这名工作人员感觉到信中有东西，打了911，随后通知了该地区的其他国会办公室。
据该部门称，里面有白色颗粒状物质，还有一张写着“哈哈”的纸条。在给美国参议员的信中，上面写着“哈哈哈，享受你的礼物，”检察官声称。
根据法庭记录，调查人员发现信件上的回信地址是Unglesbee的。
当局在他家采访了他，据称他告诉他们，他知道其他可疑物质的信件被送往全国各地的办事处。
“Unglesbee告诉代理人，他在一家餐馆听到有人提到本月早些时候邮寄的其他信件的新闻故事后，将这四封信邮寄给了四名国会议员，”起诉书说。“Unglesbee承认知道过去邮寄过白色粉末，包括炭疽在内。Unglesbee说，他知道白色粉末信件的收件人很认真，会让hazmat穿着白色衣服来，因为炭疽是危险的。＂
起诉书称，据称他说自己是在开玩笑，但他意识到收信人可能会将这些信视为威胁。
起诉书称，调查人员搜查他的家时，发现了第五个信封，收件人是其中一名成员在华盛顿特区的办公室。
Man who allegedly sent white substance to members of Congress put his address on envelopes： DOJ
A man was charged with allegedly sending letters with white granular substance， which turned out to be salt， to four members of Congress， according to a criminal complaint unsealed on Monday in federal court in Springfield， Illinois．
He was allegedly heard about reports ofother letters with suspicious substancesbeing sent to senators and secretaries of state around the country， the court documents said．
Matthew Unglesbee allegedly sent the letters to four members of Congress in the Northern District of Illinois， including the office of one U．S． senator， according to the Justice Department．
In one House member＇s office， the letter sent felt like it contained a powder substance， which turned out to be salt， the complaint said． The staffer felt something inside the letter and called 911， and subsequently alerted other Congressional offices in the area， according to the complaint．
Inside there was white granular substance， and a note that read ＂HA HA，＂ according to the department． In the letter to the U．S senator， it read ＂HA HA HA enjoy your gift，＂ the prosecutors allege．
Investigators found the return address on the letters to be Unglesbee＇s， according to the court records．
Authorities interviewed him at his home and he allegedly told them he was aware of other suspicious substance letters sent to offices around the country．
＂Unglesbee told agents he mailed the four letters to the four members of Congress after hearing someone in a restaurant mention the news story of other letters being mailed earlier this month，＂ the complaint said． ＂Unglesbee acknowledged being aware of past mailing of white powder sent in letters including anthrax． Unglesbee said he knew recipients of white powder letters ＇took it serious and would have ＇hazmat come in white suits＇ because ＇anthrax is dangerous．＇＂
He allegedly said he was joking but recognized the recipients of the letter could see the letters as a threat， according to the complaint．
When investigators searched his home， they found a fifth envelope addressed to one of the members＇ Washington， D．C．， office， the complaint said．
A lawyer for Unglesbee declined comment when contacted by ABC News．
