1993 Ford Crown Victoria Battery drain and no spark.

I have a 1993 Crown Vic that has been started all winter, every week or two, since I had a seizure and was unable to drive it. It started with absolutely no problems. One day went out to start it and the battery was dead. Charged the battery now it cranks but won't fire. I thought maybe it was out of gas, so I put some in. Still won't start, so pulled a spark plug. No spark. There are two coil packs, so I pulled a plug from the other coil pack. No spark. I find it odd that both coil packs would fail at the same time, so I thought there must be a short preventing current to get to the coil packs. Working backwards from the plugs and wires (which were new two months before I stopped driving) I thought of unplugging things to see if the battery still drained. Unplugged both coil packs (and the radio interference capacitors) and let it sit overnight. The next day the battery was still good. Plugged just the capacitors back in and let it sit overnight, battery is very low, lights are dim and starter won't engage. Is there any chance of the capacitors causing the problem or would a bad alternator take more than one day to drain the battery and cause no spark (should still get spark from the battery, right?)?