Collected Cases of Injustice Rectified or the Washing Away of Wrongs is a Chinese book written by Song Ci in 1247 during the Song Dynasty (960-1276) as a handbook for coroners. The author combined many historical cases of forensic science with his own experiences and wrote the book with an eye to avoiding injustice. The book was esteemed by generations of officials, and it was eventually translated into English, German, Japanese, French and other languages.

Song Ci was a Chinese physician, judge, forensic medical scientist, anthropologist, and writer of the Southern Song dynasty. He is most well known for being the world's first forensic entomologist, having recorded his experience examining bodies for judicial cases in the Collected Cases of Injustice Rectified.