The Brief Investigators determined a May condo fire in Des Plaines was intentionally set using gasoline. Authorities identified a 36-year-old resident as the suspect, saying he died from injuries suffered in the fire two weeks later. Des Plaines condo fire ruled arsonWhat we know:The Des Plaines Fire Department and Des Plaines Police Department announced Thursday that the May 6 fire at 1279 Harding St. was intentionally set. What's next:The condo building remains uninhabitable, and the American Red Cross continues to help displaced residents. Investigators said they found no evidence that building management or Nicor Gas were responsible for the fire.