A 31-year-old man was arrested following the discovery of five mutilated cats in Northampton in August.
A Metropolitan Police detective has said he fears the so-called Croydon Cat Killer could escalate his crimes and begin attacking women and girls.
Cats have been found dead around several parts of the country, perhaps at the hands of the 'Croydon Cat Ripper'.
Police are linking deaths of up to 230 cats and foxes across southern England.
Animal welfare group warns cat-owners to keep their felines indoors as killler strikes again.
Croydon Cat Killer strikes again: three pets found dead in London
Kitten found brutally killed in Archway
Maniac striking across London.
Cat had been dead in the garden for two days before it was reported to the police.
Men Behaving Badly star issues plea.
32 cats are known to have fallen victim to a serial killer of felines.