Car battery died and car stalled when I pushed the window button?

"Hi! I have a 2001 Ford Mustang 3.8L and for 2 weeks the battery light has been on… The battery is brand new about a month ago I got it and the alternator has been running fine. Today the battery died and the car even died while I was driving home… Soon as I jump it it makes a weird noise like a siren pitch from a fire truck but not too loud if you understand… Anyways I pushed the window button to roll the window up and then the engine stalled and battery died. I'm hoping this can be a easy fix… Not sure what to do:( i have had ppl tell me it could be the ground wire bad or window motor that drains the battery… Need help asap.

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