Their crime lab would count as sophisticated if run by a police force. But this one, incongruously, is owned by a retail chain. The $63 billion (revenues) Target got into forensics as a way to combat shoplifting and such crimes but has taken its skills far beyond the department store. Its seven-person team of investigators, most of them former law enforcement officials, spend 70% of their time fighting theft, fraud and personal injury cases involving Target's 1,600 stores. But the lab is also frequently tapped by city, state and federal law-enforcement agencies, including the Los Angeles Police Department and the Federal Bureau of Investigation, to solve big cases.