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A man who is awaiting a murder trial in the fatal stabbing of a 21-year-old woman has filed a handwritten motion requesting his case's dismissal.

Sergio Briseno Medina, 26, of Sandy, was charged with first-degree-felony murder and one count of second-degree-felony obstructing justice after Hope Gabaldon died in February from injuries related to 20 stab wounds.

Medina said in his motion, filed earlier this month, that without requested footage from two surveillance videos, he will not be given a fair trial as the Constitution guarantees.

The videos prove that at least one witness lied, he wrote, and they would clear him of guilt in the killing.

On April 11, "immediately" after Medina received a discovery statement informing him what witnesses told police, he requested surveillance videos from two West Valley City locations, he said in the motion.

The first footage was from a gas station at the intersection of 4100 South and 3200 West, where a witness said she picked up Medina on Feb. 26. According to court documents, Gabaldon was found injured near 3100 South and 4000 West. She later died at a hospital. The other footage was from a market parking lot, which sits on the corner of 4100 South and 4000 West. The witness in question told police she'd dropped off Medina at an apartment complex adjacent to the market.

Medina removed items from Gabaldon's Jeep, the witness said, which was parked at the complex. The witness also told police that on the day Gabaldon died, Medina was "acting paranoid," court documents say, and that Medina told the witness "to check the news later and that would explain things."

While several people testified to police that Medina told them he was involved in Gabaldon's death, Medina believes this particular witness' "falsified" statement "could very well be the determining factor in finding [Medina] guilty," he wrote in the motion.

Medina's eight-day jury trial is set to begin Sept. 22, court records show.

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