Suicide is killing yourself.
This article suggest snps in CREB1 affect anger and suicide, see rs4675690 and rs7569963
While this wired article suggests a risk of suicide and depression when taking antidepressants, but only in men.
variations in the gene SSAT have also been linked to suicide.
[PMID 17011525] Effect of SNP at position 40237 in exon 7 of the TPH2 gene on susceptibility to suicide.