The FBI this year tracked down a car theft suspect using his brother 's DNA . Investigators compared the DNA from the scene to records in a criminal database . DA says the evidence is n't for the courtroom , but for building leads in an investigation . `` Family members have done nothing wrong to get in the database , '' said Maryland defense attorney Stephen Mercer . A defense attorney says it violates a person 's ` ` reasonable expectation of privacy ''
The FBI this year tracked down a car theft suspect using his brother 's DNA . Investigators compared the DNA from the scene to records in a criminal database . DA says the evidence is n't for the courtroom , but for building leads in an investigation . A defense attorney says it violates a person 's ` ` reasonable expectation of privacy ''