The friend told investigators that he went to a restroom at the park and when he came out, Bernstein had walked off, Braun said. We do not believe foul play was involved at this point, and the friend is only a witness, not a suspect or person of concern.
http://www.latimes.com/local/lanow/la-me-ln-oc-missing-student-20180106-story.html
Blaze left the house around 10:30 p.m. or so, but exactly why he left is a big mystery, he said, adding that we didnt know the person he met up with.
Before leaving home, Bernstein had been in lengthy communication with his friend using social media apps that do not leave a permanent record, authorities said. He was last seen in the park about 11:30 p.m. Tuesday.
There are so many unknowns to deal with, Annee Della Donna, a friend of the family, said. Were talking about a brilliant kid who goes to a small park five minutes from home, then disappears.