The trial of a Troy man accused of killing his son continues in Rensselaer County Court. The defense called two medical experts to the stand on Thursday. Our Britt Godshalk has the details.

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TROY, N.Y. -- "It's going to come down to who the jury finds credible," said public defender Ingrid Effman.

A laundry list of medical experts presented the jury with two different determinations of how 4-month-old Matthew died - by the hands of his father, Adrian Thomas, or by infection. The defense brought in infectious disease specialist Jerome Klein to the stand. He listed off half a dozen of the baby's symptoms in his final days that the doctor and the defense say point to overwhelming infection, not homicide.

Effman said, "It causes temperature to drop to 94 degrees which is hypothermic, caused his respiratory rate to shut down, caused essentially his body to stop working right, and that's what caused this child to die. So regardless of whether anyone believes there's head trauma or not, which we highly dispute head trauma, this child died of overwhelming sepsis, which caused septic shock."

Klein testified that the bleeding on Matthew's brain could have been caused by sepsis. The defense also brought a Samaritan Hospital ER doctor to the stand who testified that when he examined the baby the week before his death, for a rash on his face, he saw no signs of abuse.

Effman said, "That counters any allegation that my client committed any crimes on the 10th of September, in that this child was healthy, happy, no problems on the 13th of September."

The prosecution brought their own medical experts to the stand earlier this week, who testified the baby died of head trauma, caused by his father, and that sepsis was merely secondary, saying the baby's organs wouldn't have been donated if his body was riddled with infection.

More medical experts will take the stand on Friday.