WASHINGTON (AP) — The Supreme Court will not hear the appeal of a former toxicologist convicted of poisoning her husband in a notorious San Diego murder case.

Former lab worker Kristin Rossum said she deserves a special hearing to determine whether her trial lawyer’s performance was so bad that she was entitled to a new trial. Rossum was convicted in 2002 of the murder of her husband, Gregory deVillers, and sentenced to life in prison.

Prosecutors said Rossum, then 24, killed deVillers in November 2000 after he threatened to expose her affair with a supervisor and her methamphetamine habit unless she quit her job.