People v. Kelly
Supreme Court of California
549 P.2d 1240 (1976)
Relevant factsFree
A police officer used a then-new voiceprint analysis technique to match recorded extortion threats to the defendant's voice, and while he was an experienced voiceprint technician and promoter of the technique, he lacked scientific qualifications to assess its reliability, did not represent the disputing scientific community's views, and neither party introduced other evidence on reliability.
IssueFree
Whether the admissibility of evidence derived from a new scientific technique depends on the technique's general acceptance by experts in the relevant field.