Wichita ? A Wichita man has been convicted of first-degree murder in the death of his 89-year-old grandmother.

The jury deliberated about two hours Friday before concluding that Theodore V. Horn’s actions on May 17 were intentional and premeditated, even though his blood-alcohol level at the time Tina Weaver was slain was six times the legal limit for driving.

The only issue at trial was whether the fact that Horn, 44, was drunk robbed him of the ability to form the premeditation required for a guilty verdict.

Prosecutors argued that Horn clearly planned his actions when he went to a bedroom of Weaver’s home, got a wooden level and beat her with it until it broke. Prosecutors said Horn then returned to the bedroom, retrieved a saw and used it to cut Weaver’s neck.

“This was a focused attack,” Assistant Dist. Atty. Marc Bennett said. “This was not some wild, reckless act. He wanted her dead. He chose the weapons he used to kill her.”

Defense lawyers argued that the killing came at the end of a week of heavy drinking for Horn. They said that on the day of Weaver’s death, Horn started drinking as soon as he woke up.

“His breakfast was a glass of vodka, his lunch was a glass of vodka, and he drank vodka between breakfast and lunch,” attorney David Freund said in his closing argument.