A relative heading for the matter which gives the summary of the matter.
date and day and place the incident took place.
the first para should have the incident when and where it took place.
the second para should contain the whole story how it happened.
at last the designation.
Hope you understood

Everyone follows the different pattern for report writing so there are no set standards. Some things which are good to write are;
Title Section: table of contents and definitions of important terms
Summary: major points of the report
Introduction: Problem statement and the purpose of writing the report
Body: main section of the report
Conclusion: the end result
Recommendations: priority wise
Appendices: technical detail to support the whole report