Still, his family is standing by its vow to find him.
Crews were out searching again Friday night.
Since the search began, police say they've received nearly 600 tips from the public and reviewed 460 videos for any clues.
Earlier this week, a picture snapped by a 13-year-old boy on the subway injected some much-needed energy into the effort to find Avonte, who is autistic and non-verbal.
The photo showed a boy who resembles Oquendo wearing a beige jacket and green khaki pants, sitting and looking straight ahead. The teen who took the photo approached the other boy and asked if he was Avonte, but the boy didn't answer.
The NYPD confirmed the boy in the photo's identity Thursday, and it was not Avonte. Still, his family remains hopeful he will be found alive.
"It's tough, it's just a tough situation right now," dad Daniel Oquendo said. "But we're hoping for the best."
The reward for information leading to his safe return is up to $95,000.