Police are continuing to search for Darren Higgins, who absconded during approved leave from a Bendigo treatment facility last week.
The 25-year-old, who was on accompanied leave from Vahland House, jumped in the Murray River near Mathoura about 8pm on 10 February.
He swam to the other side and headed into the Barmah Forest.
Higgins is currently subject to a 12 month treatment order for assault and property offences.
Two witnesses have come forward to say they believe they saw a man believed to be Higgins in the water swimming towards the NSW bank of the Murray River about 8.30pm that night.
One person attempted to speak with the man after he got out of the water, however he remained mute and headed into a caravan park.
When the man got out of the water he was wearing a light coloured shirt or singlet and black underwear.
Another person also contacted police believing that they saw Higgins walking on Haverfield Street in Echuca about 9.30pm on 11 February.
Police are continuing to search for Higgins and have notified NSW Police of his disappearance.
He is described as 180cm tall, with a medium build and dark hair.
Investigators have also released an image of him in the hope someone recognises him and can provide information regarding his current whereabouts.
Anyone who sights Higgins is urged not to approach him.
Anyone with information regarding his whereabouts should call Triple Zero (000) immediately.