Testimony in the Brent Benefield trial turns technical today.
Benefield is on trial for the death of his four month old son in February 2012, which prosecutors say appears to be the result of shaking the infant.
Mechell Dixon was in 30th District Court today and brings us the latest on today's testimony.
The prosecution continued calling witnesses today, who shed more light on the medical history and injuries of four month old Lucas Benefield.
The radiologist who read Lucas' CT and MRI scans at Cook Children's Hospital spent all afternoon testifying.
Dr. Hayden Head showed images taken on February 8 and 9th in 2012, when Lucus was flown to Cook Children's Hospital in critical condition.
Those images revealed deep injuries to the infant's brain which Dr. Head says was swollen.
Dr. Head also pointed out a neck injury that he says was indicative of a baby being shaken, as well as prior rib and other bone fractures that he estimated to be two or more weeks old.
Dr. Head says the cause of Lucas's death was the lack of oxygen to the baby's brain because of damage from the injury.
Dr. Karen Reed, Lucas' pediatrician, also testified today.
She says after Lucas was born October 2, 2011, he was fairly healthy the first month of his life.
However, Dr. Reed says that changed when Lucas came to a November appointment with a fracture of the left arm and visible bruising during a December appointment.
Dr. Reed says she spoke to the infant's parents about the fracture but did not report it child protective services, which she says she now regrets and resulted in her being investigated.
Testimony resumes tomorrow at 10 a.m.
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