Police say someone stabbed 15-year-old Deontae Smith multiple times and seriously injured two other teenagers during a fight around 1:30 p.m. on North Howard Street.
The stabbing occurred just after fans were exiting the M&T Bank Stadium for the Super Bowl Champions, The Baltimore Ravens. They say at that point the parade had already concluded.
Smith died after he was rushed to Johns Hopkins Hospital for his injuries.
Police say the two other teenagers are still at the hospital. They say one is in critical condition and the other is listed in serious condition.
Police say at this point during the investigation it's not clear if the stabbing was related to the Super Bowl celebration.
Detectives are looking for the individual pictured in the white hat and purple jacket. Anyone with information is asked to contact the Baltimore Police Department.