On the 2nd of February, 2003, Beverley Brinkley (35) was attacked on a stairwell outside a flat in The Stow in Harlow, Essex. At the time, a witness reported seeing two men attacking the mother-of-three and escaping through the car park behind the block of flats. Beverley would die from severe head injuries in Addenbrooke's Hospital four days later.
The description of the two men at the time were as follows: One was described as white, fairly short, of stocky build and aged in his late 30s to early 40s with dark wavy hair. The second man was described as white, taller, and aged in his 20s to early 30s with blond shaven hair.
Det Ch Insp Stephen Jennings said: "In 2004, Essex Police received two letters that were written anonymously and I am very keen to identify who wrote those letters.
In June 2005, a 64-year-old woman and three men - two aged 40 and a 61-year-old - were all arrested on suspicion of murder, but were released.