The DSAT includes a Status field to account for the accuracy of the attack data. CPOST separates all potential suicide attacks into two categories: Confirmed attacks and Possible attacks.
To be counted as a Confirmed Suicide Attack, the attack must be reported by two independent sources. These do not include two sources that gain information from the same newswires. For instance, if two sources both use a Reuters newswire as the basis of their report, the sources will not be considered independent. Militant groups' claims also serve as an independent source for attacks and generally provide insight into information surrounding individual attackers.
Possible Suicide Attacks fall into two categories: Too Few Sources (attacks with only one source) and Conflicting Reports (attacks where news sources conflict as to whether the attack was a suicide or not). CPOST researchers collect possible suicide attacks because information may become available in the future to confirm the attack. Our Data Collection Team periodically reviews possible attacks and if, upon review, new information confirms a possible attack as suicide, the attack status is changed in the database. The opposite is also true: if new evidence reveals that an attack no longer meets CPOST’s criteria for inclusion, it is removed.