Unsolved: Worcester returns for Season 4 on Tuesday, April 11.

The new season will shine a light on 10 more unsolved murder cases under investigation by the Worcester Police Department's Detective Unit.

Season 4's episodes tell the stories of 10 unsolved homicides spanning 6 decades, including a string of unsolved murders of young women in the late 80s and early 90s, and the oldest unsolved murder case on file with the Worcester PD, dating back to 1951.