Joseph Yang was 17 when he was killed in Fresno, California, on August 4, 2007. His death is one of a number of unsolved homicides from a period when the city was grappling with a rise in killings and ongoing gang-related violence.

Yang’s case is described as representative of many cold cases in Fresno: a lack of cooperation from potential witnesses and few tangible leads have hindered progress. The Fresno Police Department’s Cold Case Homicide Unit continues to work older matters and has been using newer tools such as DNA analysis and genetic genealogy, while agencies including the California Department of Justice and federal partners have collaborated to share resources.

Anyone with information about Joseph Yang or the night of August 4, 2007, is asked to come forward. What did anyone in Fresno see or hear that could help bring his family answers?