The episode will focus on the case of Colchester double murderer James Fairweather, who was just 15 when he killed 33-year-old James Attfield and 31-year-old Nahid Almanea in the Essex town.
Fairweather was found guilty of both murders in April last year and sentenced to life with a minimum of 27 years in prison.
Will, who covered the case from Mr Attfield’s death to Fairweather’s sentencing, said: “The murders of James Attfield and Nahid Almanea led to a period of fear in Colchester where residents were concerned to walk alone in case there was another attack.
“When James Fairweather was arrested, and then tried, the shocking details which emerged during the court case – such as how he had stabbed both victims in the eye, and how he had spent hours looking for other victims – gripped the town.
“Although almost a year has passed now since Fairweather was sentenced, the case is still one of huge interest to Colchester residents, and this documentary will certainly prove fascinating to watch.”
The programme will be broadcast at 10pm on Sunday.