Murder ESP

So I found a few servers I can use a murder esp on, but most of the time it doesn’t reveal the murderer and half of the time the person with a gun won’t show up. Is there something I’m doing wrong, is it simply outdated, or is there something on the servers end stopping it from working?

murder esps work by finding the player with a specific weapon. default is weapon_mu_knife or something, lots of murder servers now have custom weapons for the murderer, which means the old ones won't look for the right weapon and won't work
that or the script ur using is just garbage