He died last year, only age 26.
Here is the autopsy:
They found a level of 55,000ng/dl testosterone in his blood. Which is 81x that of a normal man.
His heart and liver were each 3x the size of a normal man.
His kidneys were 4x the size of a normal man.
His lungs were 2x the size of a normal man.
He had severe plaque in his coronary arteries. Enough to cause heart attack.
He had thyroid cancer (likely due to the stress of all the added hormones)
His blood pressure was through the roof. It was so high that after guest posing, he'd get nosebleeds.
He had asthma, but even resting, he could never catch his breath, His face aged rapidly, and his forhead grew ape like.
He collapsed at a bodybuilding show a short while before he died. They ran an electrocardiogram. They told him he must see a cadiologist. He ignored that directive, and instead decided to put on more size. More muscle.
They found him on the floor with food stuffed in his mouth,
Here is a video of Dallas Mccarver, age 26, at over 330 pounds: