"of a man accused of six ax murders ended early today when the defendant complained of headache", what figurative language used in that?​

Catachresis

Explanation:

Catachresis is the figure of speech used to improperly use words or terms in sentences because there is no other specific word for what the author expresses.

In relation to the sentence shown in the question above, we can see the use of Catachresis in the term "ax murders", which is the improper term to express "deaths caused by the use of an ax."

i believe that dan is so anxious because he dose not know what awaits him when he gets there. but i dont know to be honest

im the one that plot xxx murder