Austin bombing suspect used a child safety sign to conceal one of his explosives

Mark Anthony Conditt, 23, blew himself up with one of his homemade, shrapnel-loaded bombs on March 20 as a SWAT team moved in to arrest him.
2:43 | 04/10/18

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Transcript for Austin bombing suspect used a child safety sign to conceal one of his explosives
We're here today to announce that earlier today US magistrate judge Mark Lane. Dismissed a complaint that my office at filed on March 20. Against more Condit a flu were real Texas in connection with the bombings investigation. Magistrate judge lane also unsealed. Import an affidavit that we filed in support of their complaint also on March 20. As as you all know mr. Condit killed himself. Couple hours after we filed that complaint. But we have been waiting to ensure that his remains were confirmed and identified. And to determine which parts of that affidavit could be unsealed consistent with public safety. An investigative needs. Com so the Travis County medical examiner in conjunction with the round rock justice of the peace Dane Johnson on determine that those were in fact his remains. We then started the process of determining what part of that affidavit to be unsealed as I'm sure you all know. The press has a qualified right of access to judicial records and so judges balance security needs safety needs investigative needs against the right of the public. To know what's in court documents and so today we furnished you with V. Partially redacted affidavit. On and that explains our basis for probable cause on the night of march 20 to seek an arrest warrant and and to file a criminal complaint against Condit. The thing that we charged him win at the time was one count of the unlawful possession and transfer of a destructive device. That is a an offense under the national firearms act of year old statue from the 1930s it's actually found in the internal revenue code if you can believe it. That does not mean that was the only thing we would've charged him with nor does it mean that. District of three more would not have also charged him with state level offenses. That offense was included just so we could get the complaint on file and get the arrests were obtained arrest warrant and pick him up and for him into custody. Very likely we would have sought an indictment after Matt that included for more serious charges than the destructive device charge sort of wondering why's it's the only charge. In the complaint that fourth. So just just a couple things to to follow up on the will turn it over for questions. One the investigation continues. Were looking at his intent his motivations. There are no further suspects at this time and we do not have any reason to believe there's a further destructive device out there although the public should remain vigilant for suspicious packages. I'm but we are looking through very voluminous computer records on to examine his intent motivations and so there is still an ongoing investigation. On the we do urge the public to remain vigilant about suspicious packages and contact the APD if if you noticed a suspicious package.

This transcript has been automatically generated and may not be 100% accurate.

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