dialogue entre un suspect et un policier

Sujet du devoir

je dois faire un dialogue en anglais entre un suspect et un policier.

Où j'en suis dans mon devoir

je l'ai déjà fait, je veux seulement savoir si j'ai des fautes. merci.

After a lengthy investigation about the tragic death of Patrick Maloney, the police officer finally found the murderer. Jack Noonan arrested the culprit. He interrogated Mrs Maloney at the police post in order to have more information.  

“Mrs Maloney, we both know why you're here”, he began.

“I don’t see what you mean”, she denied peacefully.
“Really? No problem. Well, so you can tell me what you were doing when your husband be killed, don’t you ? ”, he asked stealthily.
“I've already said it, I went the grocer, you can even go see him”, she sighed.
"I was sure you were going to say that. We did, yes.” He answered.

“And what did he say?” she asked anxiously.

He kept silent.

“He confirmed your presence.”

“What did I tell you?” she boasted scornfully.

“Yes but we have to tell you something”, he snapped.

She wondered what it could be.

“The grocer heard you call to your mother and he listen to the conversation and realized that your mother was at home to prepare the lamb, can you confirm what he said?” he added with his eyes fixed on.

“Yes this is true”, she said with an air of inflexible calmness.

He winced.

“Oh no... It’s awful, don’t you think that... my mother... Could... oh my god!”, she yelled.

He nodded.

“His fingerprints were found on the body of the victim and on the one side of the body were found your mother's ear loops”, he admitted bitterly.

“She has never loved my husband, but how did she have done this?” She whispered in a stifled voice.

“Sorry... now you can go home, go to rest. Thank you for your cooperation. Good luck.” He declared quickly, leaving alone the woman.

He left the room. But a strange atmosphere reigned in the room. Something was still indescribable. Jack Noonan could not decipher the Mrs Maloney’s smile at the announcement of the arrest of his mother. It seemed so evil. Something was wrong but he did not know what.