I would probably just say "He tried to attack me and I had to defend myself" You don't want to say too much before you talk to a lawyer, but give em something for the incident report. So when the prosecutor sees it he immediately throws you on the "victim" side of the case.
If the report just says "We found a dead guy int he living room and the homeowner wouldn't tell us anything until his lawyer got here" makes things look kinda suspicious.
I would definately point out any evidence that HELPS your case. If the intruder has a bunch of your stuff in his pocket, make sure the cops see it. If the intruder had a weapon and it slid under the couch when he "slipped and fell" point it out too.