I’ve just realised I’ve been here and walked around this pond - I remember thinking how wild it was even though it’s in the middle of the city - it was summer but all the edges of the park etc were very overgrown. It isn’t a well- manicured Park, it’s quite rough and ready and with lots of direct access to the water.Sounds like they are acting on intel' - maybe the guy they have arrested has told them something or the police have traced his movements in the last few days. Either way this is not looking good and from what I've seen on google maps it looks like there is quite a lot of vegetation, trees and such like close to the pond.