Charlotte police have finished their investigation into how a 16-year-old was able to climb into the wheel well of plane bound for Boston. The mangled body of Delvonte Tisdale was found last November in a Boston suburb that lies beneath the airport flight path. Charlotte officials now know more about how that happened, but they're not sharing details. In an update to the Charlotte City Council on Monday night, Police Chief Rodney Monroe and City Manager Curt Walton read from a prepared script and did not give details of the investigation. "This report has been classified and very little if anything can be shared from the report beyond what has been stated tonight," said Walton, adding that the Transportation Security Administration and Secretary of Transportation refused to allow the report to be released because it contains "Sensitive Security Information." Earlier this month, Homeland Security Secretary Janet Napolitano said the Tisdale case was an apparent breakdown in security at the Charlotte airport. CMPD detectives looked at surveillance video, examined the airport perimeter fence and interviewed security personnel. Did they figure out how Tisdale got into the airport? "Detectives identified various locations where Mr. Tisdale may have breached airport security and gained access to the aircraft," said Chief Monroe. What they couldn't figure out, said Monroe, was how Tisdale got to the airport or why he decided to stowaway in the landing gear of a plane. The incident has garnered national media attention and is the subject of multiple federal investigations and Congressional hearings, but the report from Chief Monroe and City Manager Walton lasted a mere seven minutes. Then it was time for Mayor Anthony Foxx to invite follow-up questions from the council. His query was met with silence. Council members have not seen the full investigation report and because it's classified, they don't expect to see it. Mayor Foxx said after the meeting he's at least encouraged by Chief Monroe's promise that the airport's electronic security system will be improved and more airport police will be hired.