Replacing police/swat voice lines

Been trying to replace the police/swat voice lines but can't seem to get anywhere. Been using this tutorial to set it up, but using the "police" event doesn't seem to do anything, and the "cops" event seems to just.... mute them. Not sure where to go from here
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Found a semi-solution? So it does work, but the way general enemies like the swat officers are handled are weird. Sometimes audio files don't work, and other times it does.