DETROIT -

Detroit police have released a person arrested in connection to a 14-year-old boy's stabbing Wednesday night on a city bus.

Police said Thursday they had arrested a suspect in DeJon McGhee's stabbing. However, they have determined that person is not the suspect.

DeJon still is in critical condition at a hospital. Witnesses -- many of them DeJon's classmates at Martin Luther King High School -- said he had stepped in to try to break up an argument between two men on the Detroit Department of Transportation bus.

When McGhee stepped in the man got upset, his classmates said. Police said DeJon was defending himself when he punched the man in the nose. The man then took out a knife and stabbed him.

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Police Chief James Craig said DeJon identified the suspect from a photo lineup. However, as it turns out that person is not the suspect.

Craig said more details on the suspect would be released after any charges were brought.

Anyone with information on this stabbing needs to contact the Detroit Police Department's 10th Precinct Detectives Unit at 313-596-1040.