One of the questions submitted to the jury, as required by a Texas statute, was whether there was a probability that the petitioner would commit further criminal acts of violence and would constitute a continuing threat to society. In addition to introducing other evidence, the State called two psychiatrists, who, in response to hypothetical questions, testified that there was such a probability. The jury answered the question, as well as another question as to whether the killing had been deliberate, in the affirmative, thus requiring imposition of the death penalty. On appeal, the Texas Court of Criminal Appeals rejected petitioner's contention that such use of psychiatric testimony at the sentencing hearing was unconstitutional, and affirmed the conviction and sentence.