evidence: In a statement, the PSNI said: "Following extensive investigations by detectives in Serious Crime Branch, a murder investigation has been launched." [...] PSNI Detective Chief Superintendent Lindsay Fisher said: "Mary Ward is the fourth woman to be murdered in Northern Ireland in just six weeks. This is absolutely appalling. [...] On 13 September, the body of 43-year-old Rachel Simpson was discovered in a garage beside a house in Belfast. Her son, 21-year-old Nathan Simpson, of Castlereagh Road in Belfast, has been charged with her murder.