Scientific Evidence & The Courthouse | The Kojo Nnamdi Show

The Constitution guarantees criminal defendants the right "to be confronted with the witnesses against him". But more and more cases are being decided based on DNA analysis and drug testing, not witness testimony. Last week, a divided Supreme Court ruled that lab technicians must testify on their results, citing recent reports of mistakes and poor practice in labs across the country. Tech Tuesday explores how questions about technology and science are influencing the nation's courts.