If a muslim is in the freight business, I would like to know if it is permissible in Islam for storing alchoholic drinks (cases of beers) in a warehouse.
In the name of Allāh, the Most Gracious, the Most Merciful.
As-salāmu ‘alaykum wa-raḥmatullāhi wa-barakātuh.
In principle it is not permissible for a Muslim to have any dealings directly or indirectly with wine or any substance which would intoxicate or cloud the mind.
Allah Ta‘ala mentions in the Holy Qura’an:
O you who believe! Intoxicants (all kinds of alcoholic drinks) … are an abomination of Shaitan’s (Satan) handiwork. So avoid (strictly all) that (abomination) in order that you may be successful. 
It is narrated on the authority of Ibn Umar Radiyallahu Anhuma that the Prophet Sallalahu Allaihi Wassallam mentioned;
“Truly Allah Ta‘ala has cursed Khamr (wine) and he has cursed the one who produces it; the one for whom it is produced; the one who drinks it; the one who serves it; the one who carries it; the one for whom it is carried; the one who sells it; the one who earns from the sale of it; the one who buys it and the one for whom it is bought.”
Hence in light of the above, it will not be permissible to under take such contracts in a freight business, one should look at other alternative contracts and earn a halal source of livelihood.
And Allah Ta‘ala knows best
Mufti Luqman Hansrot