Cops think a jealous ex-boyfriend may be behind a weekend shooting in Davenport.Davenport cops are looking for a suspect in a fatal Saturday morning shooting. They want to question 20-year-old Juan Lazno or Lazano in connection with the shooting of 29-year-old Jacinto Caldera of Moline. Officers say a group of people had gathered at a Davenport apartment when someone broke in and started shooting. Caldera was hit three times and died at the scene. A witness says the shots were intended for Caldera’s 20-year-old girlfriend who used to date the suspect.