Detectives investigating the drowning of a two-year-old boy in a nature reserve lake have released an image of a dogwalker who could be key to the tragic case.
Greyson Birch was hauled out of the water by firefighters after emergency services rushed to the secluded area and took him to hospital but tragically he died four days later.
An 18-year-old man was arrested on suspicion of neglect following the distressing incident at Swanwick Lake, near Fareham, Hants, on May 30, and remains on bail.
Today Hampshire Constabulary have released CCTV video footage of a dog walker detectives would like to identify as they continue to investigate the circumstances surrounding how Greyson came to be in the water.
The clip shows a person walking with a dog on a lead down Sopwith Way before turning in to a path in the trees towards Swanwick Lakes just before the NATS site.
NATS is the main air navigation provider in the UK and its Swanwick control centre - which is next to the lake - is one of two in the country.
A spokesperson for the force said: 'We appreciate the quality is poor, but we are hoping that we can reach out to this person or anyone who knows them, as we are keen to speak to them and establish whether they saw Greyson that evening at the reserve.'
Greyson Birch, two, was hauled out of the water by firefighters at Swanwick Lake in Hampshire
Now police have released a picture from CCTV of a dogwalker they think could help them
This week detectives also released a photo of 'bubbly' Greyson, taken that day in the clothing he was wearing - a blue striped top, dark shorts, and white trainers.
Detective Inspector Matt Gillooly, who is leading the investigation, also revealed Greyson visited Lakeside Country Park in Eastleigh, Hants, shortly before visiting Swanwick Lake.
DI Gillooly said: 'Our investigation is tracing all of the steps leading up to Greyson's tragic
