A post is missing. This may duplicate thingsThanks.:)
Only two of you were there. Keep your cool. Think like you are playing back a video- just repeat what you saw with your eyes, heard with your ears, felt on your body, what you know from first hand, present sense input.
Its okay to be unsure of something, but try to radiate certainty- not rigidity, but certainty about your answers.
Don't get in a verbal joust with the lawyer, but if you have to glare at someone do it at the lawyer, not L's dad. Do not speak directly to L's dad. Watch out for cheap shot from him when your are walking up to the stand. he will want to rattle you.