His mother, Elizabeth Jackson, first posted about the accident, which apparently happened Friday night near Reno, Nev., on Saturday. "Please pray for my son Nathaniel Marston," she wrote. "He was in a car accident last night and is in the intensive care on life support. Back and neck broken in several places. Other internal injuries. Please pray that he will recover and walk again."
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Jackson continued to provide updates throughout the weekend. On Sunday, she wrote that his prognosis looked bleak.
"If he lives he will be paralyzed from the neck down and will not breathe without a ventilator machine," she wrote.
She also later added that his shoulder is broken, along with all of his ribs, and that Marston has a collapsed lung.
Jackson has maintained that the 40-year-old soap star was not under the influence of drugs or alcohol at the time of the crash.
Marston is perhaps best known for his six-year stint on "One Life to Live," which he left after 2007. The actor also played Eddie Silva on "As the World Turns" and guest starred on "Castle," "White Collar" and "Blue Bloods."
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