Evanston police have concluded that a 10-year-old boy found hanging from a hook in the school bathroom earlier this month took his own life.

“The Evanston Police Department concurs with the Cook County Medical Examiner’s Office as it pertains to its postmortem examination finding that Aquan Lewis’s death was self-inflicted,” Cmdr. Tom Guenther announced Tuesday afternoon.

Guenther said the police investigation, which is now closed, determined that Aquan, a fifth grader at Oakton Elementary School, threatened suicide earlier on the day of his death. The finding is also supported by physical evidence, including the boy’s polo shirt and his footprint on a toilet in a third floor bathroom of the school, 436 Ridge Ave.

Aquan was found by a fellow student sometime between 2:40 and 2:57 p.m., when police received a 911 call, Guenther said. He was originally taken to nearby St. Francis Hospital and later transferred to Children’s Memorial Hospital in Chicago, where he was pronounced dead at 4:05 a.m. the next day, Feb. 4.

The medical examiner ruled later that day that Aquan had hanged himself. But his mother, Angel Marshall, said publicly she didn’t believe her son killed himself.

The police department did not let the medical examiner’s ruling affect their investigation, Guenther said.

Their finding had a significant impact on Marshall, said her attorney, Todd Smith, after the announcement.

“She was destroyed today in hearing from police that this was their conclusion as well,” he said.

But the 1 p.m. press conference, which lasted less than 30 minutes, left many questions unanswered.

Guenther and Evanston/Skokie School District 65 Superintendent Hardy Murphy, who appeared alongside the police spokesman at the announcement, could not say if there was a specific reason for the suicide. They did not know if the teacher or Aquan’s classmates noticed he was missing from the classroom and said he could have been missing from the class for anywhere between five and 40 minutes.

Smith said he wasn’t satisfied with the police findings.

“I’m concerned about exactly when this child was last seen by somebody,” he said. “That’s an answer I think we’re entitled to. I think we’re entitled to why we have not found in this investigation some sort of trigger.”

The district is conducting its own internal investigation.

Read more in tomorrow’s Daily.