Bonjour, j'ai besoin d'aide pour cette exercice d'anglais je suis en 5ème

Fill in the blanks with the right relative pronoun:
The murderer.....committed that crime was an old man.the only time.........he could kill his
victime was between 2 and 3 am .The kitchen..........the policemen found the clues, was in terrible state.

Merci de m'aidez