While Mehta dismissed the wrongful death and negligence civil counts against Trump, Garza's claims against the defendants under D.C.'s Survival Act and the conspiracy to violate a civil rights claim will proceed.
The Survival Act allows an individual's legal representative to pursue legal action on their behalf after their death.
Mark Zaid, an attorney representing Garza, did not immediately respond to Fox News Digital's request for comment.
He was rushed to the hospital but died the next evening from two thromboembolic strokes.
According to the ruling, the D.C. medical examiner's office found that Sicknick died of "natural causes" from a series of strokes and that "all that transpired on [January 6] played a role in his condition."
Trump is facing a series of legal challenges related to his alleged role in the Capitol riot.
A federal appeals court last month rejected the former president's efforts to dismiss civil claims seeking to hold him to account for the riot on the basis of presidential immunity.