A 72-year-old woman has died after being injured at St Boltophs Crescent in Lincoln lived in a quiet residentlal street mainly occupied by other elderly residents.
Officers from Lincolnshire Police are focusing their investigations around a block of maisonettes in the street.
A 38-year-old man is being questioned by police on suspicion of murder.
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The 18-year-old went missing in 1991, and her body has never been found.
A couple in Northamptonshire who stole a 71-year-old woman's purse from her wheelchair were caught in the act on CCTV.
Patchy light rain or drizzle for most, with snow on the way for parts of the region as temperatures drop tomorrow.