UPDATE: David Hasselhoff just tweeted saying Tanya has been found alive and well in a shelter!
David Hasselhoff has joined the hunt for a missing British woman with severe epilepsy.Writing on his twitter, David says
A friend of mine's sister is missing. She was last seen in Downtown LA. If you are in LA please re-tweet this....http://twitrpix.com/dzc3
Members of the public have reported disturbing sightings of a distressed Ms Fielding all week, but her family are still desperate to locate Ms Fielding - who they say will befriend anyone.