Update: A Bunbury man, 20, who went missing in Bicton last night has been found safe and well.
After several unconfirmed sightings in the East Perth area, Mr James’ 19-year-old brother Haydn located his brother in Mount Lawley at 4.15pm.
Police think he rode his scooter along a bike path from Bicton to East Perth.
After a sleepless night searching for her son, Mr James’ mother Lisa Egan was overjoyed at the news.
“I was out of my mind because I know how vulnerable he is,” she said.
“I was trying not to fear the worst but you always do. I did not want to go through another night.”
She said her son, prone to anxiety, seemed slightly agitated but otherwise was okay.
Earlier his mother said she was extremely worried her son might not be able to explain to people that he was lost.
A full scale police search was underway for the 20-year-old, who was last seen riding his foot scooter on Yeovil Crescent in Bicton at 5pm yesterday.
His mother Lisa Egan said it was highly unusual for her son to go missing for such a long time.
"He doesn't know the area very well so we think he has gone a bit far and become disoriented," she said.
Ms Egan, her sons Rhys and Haydn and her parents all came from Bunbury to her sister's house for Christmas.
"Me, my father and my brother-in-law have been out searching the whole night - we started looking for him as soon as it got dark.
"He sometimes goes off but he always comes back. The longest he has ever been missing for is an hour.
"He is friendly but very timid and does not have a lot of speech. He would not necessarily have the right words to explain that he is lost."
The family reported Rhys missing at about 9pm. Police this morning led a search in patrol vehicles, on horses and on foot.
More than 40 State Emergency Services crew searched a five-block radius around the point where Rhys was last seen.
Earlier today, mounted police concentrated their search to bushland and bike paths along the Swan River and near the Blackwall Reach limestone cliffs.
Ms Egan said her son was a fit young man and a reasonably strong swimmer, but relies on anti-anxiety medication to stabilise his mood.
"If he doesn't take that within 48 hours, he would start to get withdrawals and get increased anxiety," she said.
Mr James' relatives were concerned he may have left the area and police were also searching around his Bunbury home.
"I don't think he has gone back to Bunbury, but he could have got a bus or got into a car with someone, especially if they told him they were going to take him home," she said.
Family members and friends from Bunbury and around Perth joined in the search for Mr James and the Bicton community members scoured the streets in an effort to locate the young man.