Original sentence: According to former MI6 agent Captain Fred Holroyd, the killings were organised by British Army officer and member of 14th Intelligence Company, Captain Robert Nairac in collaboration with Robin Jackson and the UVF's Mid-Ulster Brigade, which Jackson commanded
Edited sentence: Former MI6 agent, Captain Fred Holroyd, alleged that the killings were organised by British Army officer and member of 14th Intelligence Company, Captain Robert Nairac in collaboration with Robin Jackson and the UVF's Mid-Ulster Brigade, which Jackson commanded