Last week, federal authorities fined Munilla Construction Management $25,868 for “serious” safety violations in its role as the contractor on the Florida International University bridge that collapsed in March, killing six people. The morning after the collapse, Juan Perez, director of the Miami-Dade Police Department, said the department’s homicide squad would explore criminal charges for contractors such as MCM. “We’ve got to look at the reality that there may be some negligence down the line,” Perez said. Perez answers to Miami-Dade Mayor Carlos Gimenez, who appointed him director in January 2016. Miami-Dade is the only county in Florida where the...