Quiet deaths?

I have plans for one of my characters to get killed, and for his brother to find him. Said character lives in an apartment building so I need a death that would be quick (he'd die within minutes of receiving the wound or whatever) but wouldn't cause enough noise to alert any of his neighbors. Any ideas?

Smothering or suffocation can be quiet depending on the circumstances. I think that if one was sleeping, and then awoke to be smothered with a pillow, they wouldn't be able to make a loud enough sound for neighbors to hear. Other things like waking up a person by slitting their throat may also work.

Poison always works. Or decapitating him.

I'm pretty sure that twisting their neck suddenly and sharply would kill them instantly.

Carbon Monoxide poisoning. Not exactly quick, but he might not know it's happening and thus not seek treatment, thus dying rather painlessly and quietly.

Cyanide is always fun too.

Gag him so he can't scream, tie him up so he can't take the gag out, and then slit his throat.

A few possibilities:

Chokehold. Kidney stab. Silenced pistol. Hammer or other blunt object to back of head. Neck snap. Garrotte. Larynx crush. Drowning. Electrocution.

More exotically: Crashing around won't matter so much if it's overlaid with an aural soundtrack indicating that he's getting it on. A less R-rated option would be an enjoyment for heavy metal OR a soundproofed audiophile room/ apartment.

Not as funny, though.

Is this a murder, accident, or what?

There's always the possibility for an aneurysm, heart attack, etc.- most medical related deaths aren't that noisy.

If you're going for violence, how about slitting an artery? You bleed out really fast if, say, the vein in your leg gets cut, and you probably wouldn't have much time to shout out. Or if you were paralyzed- I think there's something about stabbing between the lungs that renders a person unable to move while they choke on their blood, but I can't say for sure. Being stabbed/strangled from behind would cut out any time for a struggle and consequent sounds, or if he was drunk and out of it.

Or suicide.

Thanks for all of the suggestions. I think I'm going to go with the slit throat, since it would be quick and also quiet.