If Your Mom Or dad Killed someone And cops knew it happened and they went to arrest one of them would you tell the cop The truth?

So Let’s say Your mom or dad killed someone and Took you on a walk to get outta there and a cop Walked up behind you grabbed a Hold of you and pulled you away from them
Would you Tell the cop right then the truth? Or would you be Too scared worried wanting to protect them?
I wouldn’t hesitate and would Tell the cop the Truth.
If Your Mom Or dad Killed someone And cops knew it happened and they went to arrest one of them would you tell the cop The truth?
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