The trial is officially underway for Joshua Gaspar, the man accused of striking and killing an Ohio State trooper on Interstate 90 last September.

Both sides offered opening statements, and an eyewitness to the crash gave his testimony on what happened. The trial will continue tomorrow.

WKYC streamed the first day of the trial. A video of the day's proceedings can be found on Facebook.

Gaspar, 37, is charged with aggravated vehicular homicide after striking and killing Ohio State Trooper Kenneth Velez on I-90 near McKinley Avenue in September 2016.

Gaspar was originally accused of being under the influence of drugs at the time of the crash, but a doctor who examined him the following day told WKYC that Gaspar tested negative for all drugs of abuse. He had taken prescription methadone earlier that day.

A portion of I-90 was recently renamed in Velez's honor.

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Stretch of I-90 renamed after fallen officers