On 5 February 1983 DynoRod were called out to a blocked drain near 23 Cranley Gardens, Muswell Hill. To the engineer the blockage looked suspiciously like human remains. When the police popped round the following day Dennis Nilsen confessed that 15 or 16 others had met the same fate since 1978. Nilsen became known as the Muswell Hill Murderer, sentenced to life imprisonment on 4 November 1983, with a recommendation that he serve a minimum of 25 years.
Trivial Matter: London in 140 characters is taken from the daily Twitter feed @cabbieblog.
A guide to the symbols used here and source material can be found on the Trivial Matter page.