Two men have been given lengthy prison sentences for their involvement in the death of teenager Josh Harling in Thame on 22 July last year.
Since the start of the year, there have been five murders in the Thames Valley area - two in Buckinghamshire and three in Reading. All involved knives.
Nimroy Hendricks was found with stab wounds on Russell Way on Tuesday. He died at the scene. A 14-year-old girl was detained in London on Wednesday.