Death at a dinner ( and then there were fewer)

As Draco made inventions for his dinner party his mom was making the dinner and his dad was putting up the decorations. "Where is the flour!'' said Dracos mother. "It's in the first cabinet" said Draco. Everyone was in a hurry because they just moved in and this was their first party ever. This is what the family looked like:

As the guest arrived music was turned on and the lights were turned blue and red. There was alot of dancing and talking. But then the lights went out and there was a loud scream.When the light came back on one guest was missing.

So the party was broken up into three and the searched the mansion. One group found the missing guest but she was dead! She was stuffed in an air duct vent. so Draco called his mom up stairs. When she came up the stairs and the dead body she screamed to the top of her lungs.

So everyone went back downstairs and formed back into a group. Draco wondered...."Who would do something like this?"