By Alex Dobuzinskis

LOS ANGELES (Reuters) - Investigators have found no DNA link between a professional tennis referee charged with killing her husband and the coffee mug police say she used to bludgeon him to death, the woman's attorney said on Thursday.

Lois Goodman, 70, was arrested in August while she was preparing to officiate at the U.S. Open Tennis Championships and accused of killing her 80-year-old husband, Alan Goodman, at their home in Los Angeles on April 17.

"The DNA on the coffee cup came back solely to the husband and not to Ms. Goodman, which supports our theory that the husband was holding the cup and then he fell on the cup, and that accounts for the shattered pieces of the cup being embedded in the right side of his head," attorney Robert Sheahen said.

The DNA testing results were included in exchanges of materials between defense attorneys and prosecutors as part of the pre-trial discovery process, Sheahen said.

Sandi Gibbons, a spokeswoman for the Los Angeles District Attorney's Office, declined to comment on Sheahen's statements.

"We're not going to try this case outside of court and we're not going to comment on the evidence until it's actually testified to in the court of law," Gibbons said.

The defense discussion of the DNA testing came one month after Goodman's lawyers said she had passed a lie detector test set up by her attorneys in which she denied killing her husband.

Sheahen said the polygraph results had been shared with prosecutors. But under California law, the test cannot be presented in court unless both prosecutors and defense attorneys agree, which Sheahen acknowledged is unlikely.

The next hearing in the case is scheduled for December 7. Continued...