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The article focuses on the admissibility in the court of the bullet lead data, or the bullets found at crime scenes, as forensic evidence. The hypothesis justifying the compositional analysis of bullet lead (CABL) is that the chemical concentrations of the lead used to make a batch of bullets provide a unique signature. The concerns raised by these issues in the legal community regarding the scientific validity and legal admissibility of CABL in court proceedings are discussed.

The article comments on the specific case of compositional analysis of bullet lead as a forensic tool. It also discussed the important point of the article "Data Integrity and the Scientific Method: The Case of Bullet Lead Data as Forensic Evidence," by Clifford H. Spiegelman and Karen Kadafar, that is, only open scientific and public scrutiny can guarantee the integrity of tbe data and the methods used to draw inferences about any problem in just about any venue, and that some current practices in expert testimony go against those principles.