A 42-year-old man has been arrested after a snake was seen being thrown into a canal in Gloucestershire.
Eyewitnesses described the snake as having a cream zig-zag diamond pattern along its length. Detectives believe it to be a boa constrictor.
A Gloucestershire Police spokesman said the man - who lives in Stroud - had been arrested on suspicion of releasing a species of animal into the wild.
He has been bailed to return on 14 October.
The incident happened on 12 August.
"Following the allegations police conducted a search of the canal bank but didn't find the snake," the force spokesman added.
Boa constrictors can live for 40 years in captivity and can grow to four metres (13ft) in length.
Wildlife experts said at the time, the snake could still be alive if it had been able to find warmth, but it was unlikely to survive the winter.