In newly filed court documents, prosecutors are calling on a judge to sentence Charles Tan to 25 years behind bars, the maximum sentence.

The motion entered comes after Tan pleaded guilty to gun charges linked to the murder of his father Jim Tan in Pittsford in February of 2015.

Tan was charged with murder for his father’s death, but ultimately, after a mistrial was declared, a judge dropped those charges.

However, last year, federal authorities picked up Tan on gun charges related to how he purchased the weapon reportedly used in the shooting. Investigators said Tan illegally had a friend purchase the weapon for him after he was denied the sale.

Tan admitted to those crimes in June.

Sentencing for Tan is scheduled for November 19. While he faces the maximum of 25 years, he could end up serving significantly less time, including (though unlikely) just time served.