The jurors, all women and the youngest members on the panel, wiped their eyes with tissues while Dr. Jeffrey Gofton, a forensic pathologist for the state Medical Examiner's office, testified he believes Susan Hamilton, 55, died from possibly three blows to her head with a blunt instrument. One blow crushed her skull, Gofton said.
She was strangled with a necktie and then her face was repeatedly smashed into the tile floor in the bathroom of her Quail Creek home.
Dr. John Baxter Hamilton is on trial for killing his wife. If convicted of first-degree murder, Hamilton, 53, could be sentenced to life in prison with or without the possibility of parole.
Jurors have spent two days hearing testimony and looking at photographs of the bloody crime scene and injuries the victim suffered.
Oklahoma City police Sgt. Larry Spruill, a crime scene investigator, was on the stand for a second day Thursday, detailing what the evidence means and how it got there.
Spruill told jurors he believed the attack happened quickly and the victim fought to free the necktie from her neck.
"She was taken down almost immediately and spun onto her face, Spruill said. "I don't think it took very long at all. I would say less than two minutes.
Marks made by the victim's fingernails were found on the body. Spruill said she probably grabbed at the necktie with both of her hands.
Prosecutors claim the defendant had fingernail scratches on one of his shoulders when he was arrested. The defense says the scratches could have been made by a number of objects besides fingernails. Pictures of his injuries have been shown to the jury.
One unanswered question for investigators is how the killer got out of the house at 3056 Brush Creek Road without leaving a bloody trail. Officers say they can account for all the bloody footprints inside the house, but there is no evidence showing how the person got outside.
Prosecutors are trying to prove Hamilton hid his bloody clothes and the blunt instrument used to kill the victim. Prosecutors claim Susan Hamilton's flesh and blood found inside John Hamilton's car came from the clothes and the blunt instrument. Police haven't found the murder weapon or the clothes.
Defense attorneys say the victim's blood and flesh got in the car when Hamilton realized after calling 911 his car was blocking the drive for emergency vehicles. The doctor stopped giving his wife cardiopulmonary resuscitation and went to move the car, but he was shaking so badly he couldn't get the key in the ignition, defense attorney Mack Martin said.
When asked if there shouldn't have been a blood trail in the house if the defense theory is true, Spruill said: "I would expect that. It doesn't always happen that way.
"I didn't find any evidence of blood leading up to the front door. We don't have a weapon. Someone had to leave.
Spruill told jurors he has an opinion on how the killer got out of the house without leaving a blood trail even though the evidence doesn't provide an answer.
The investigator testified he thought the killer first took a shower and then let the water run for an extended period of time. The attacker poured cleaning solution in the drain in an attempt to prevent investigators finding blood in the shower, the investigator said.
The killer, careful not to step in the blood, changed into clean clothes and concealed the bloody clothes in a plastic bag before carrying them out of the house, Spruill said. The perpetrator then turned up the heat in the bathroom so the water in the shower would evaporate, he said.
"There is physical evidence missing from this crime scene, Spruill said. "Someone got out of that room without leaving a bloody trail. I can only speculate how.
Testimony is expected to continue this morning before District Judge Ray Elliott. Prosecutors may finish calling their witnesses today.