From police statements and other information provided in MSM, the witness at 9.33am discovered an agitated dog, no owner in sight, a lead and harness discarded on the ground near water, and a mobile phone near on a bench near a river - which MSM has shown to contain warning signs above the bench about it being very deep and dangerous water.
We know from police and MSM that the witness at 9.33am did not immediately raise the alarm after discovery of the scene.
There is no suggestion from MSM, Police or from the witness interview to a local media outlet, that she stayed on the scene to try and find the owner of the dog, shout out or check the surrounding area, including the water so in the absence of any such confirmation, we can therefore assume those things didn't happen.
What we do know, and is relevant to the wider understanding of the case and timelines, is that from MSM information and in her own words (whilst asking local news outlet not to be named) that she had an appointment to attend, and had to rush home and that she later spoke to her daughter in law.
So alarm was raised 1 hour and 17 mins after initial discovery of the bench scene.
From the police and MSM reporting, including in the words of the witness, the dog was tied up by the witness and left at the scene.
I have searched MSM and police statements and see no other comment or analysis on this series of events so in line with rules, I'll make no further comment.