TLANTA (AP) — The Georgia Supreme Court has upheld the convictions of an Effingham County man convicted of killing his father and brother after the suspect had an affair with his brother's wife.

The court announced the ruling Monday morning.

Attorneys for convicted killer Craig Heidt had argued that he deserves a new trial, partly because authorities ignored evidence. Heidt claimed the evidence against him was insufficient to convict him and pointed to conflicting expert testimony about the causes of the bruises on his arms. The court, in a unanimous opinion, disagreed.

Heidt was sentenced to life in prison in 2010 for the slayings of his father, real estate developer Philip Heidt, and brother, Carey Heidt. Prosecutors say Craig Heidt was sleeping with his brother's wife.