Act as an accomplished Literary Author. Write a short story (max 500 words) about a dinner party where a murder is announced. The narrator must be an 'unreliable narrator' suffering from 'paranoia'. Do not explicitly state the narrator is paranoid; instead, use subtle subtext, disjointed sensory details, and skewed interpretations of other characters' dialogue to convey their mental state. The truth of the event must remain ambiguous to the reader until the final sentence.