The completed report is: "During the chase, the suspect threw a jelly donut directly at me, completely ruining my brand new suit. Although I tried to run after him, I slipped on the jelly, and the only footprints left at the crime scene were mine."

Here is how the forms work in this story:

• me: Used after prepositions like "at" or "to" (at me).

• my: Used before a noun to show who owns it (my suit).

• I: Used as the subject performing the verb (I tried).

• mine: Used alone to replace "my + noun" (the footprints were mine = the footprints were my footprints).