Sussex Police said on Tuesday (June 9) they want to identify and trace this fisherman, who officers alleged to have kicked a elderly dog into a lake at Ditchling Common.
At about 12.20pm on Thursday 14 May, an off-duty nurse was walking her Labradoodle, by a lake at Ditchling Common Country Park near Burgess Hill.
Officers claimed a dog belonging to another woman jumped into the water, whereupon the man started to shout and swear aggressively.
He then shouted at the Labradoodle too, before kicking it twice.
The blows are then said to have caused the animal to fall down the bank into the lake.
However, police said, in the end, the dog was not injured.
The man in a photograph issued by officers is described as white, in his forties, 5'10", slightly overweight, with short dark hair, wearing a green jumper, combat trousers and black boots.
PC Michelle Holdstock said:
"The woman felt frightened and intimidated by his behaviour.
"If you recognise this man, or if you are that man, please contact us right away, either online or by calling 101, quoting serial 545 of 14/05."
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