A trial began Tuesday for a man accused of causing a December 2014 crash that killed two pedestrians, including a woman from Delaware County.

The Associated Press reports that Terrence Trent, 63, is on trial for recklessly driving his truck into a school bus that then hit two pedestrians standing on the sidewalk on Dec. 12.

One of the pedestrians, Stephanie Fibelkorn, 21, was from Delaware. The AP also reports that Columbus city engineer William Lewis, 58, was also injured in the crash and died on Dec. 29. Lewis had been walking to a meeting with Fibelkorn, who was interning with the city.

Trent now faces vehicular homicide charges for the crash after two psychological evaluation found he was competent to stand trial, the AP reports. The AP also reports that a third evaluation stated Trent is incompetent to stand trial and suffers from “disorganized and delusional thinking” and possibly dementia.

Assistant Franklin County Prosecutor Keith McGrath told jurors Tuesday that before the accident Trent was speeding, weaving in and out of traffic and running red lights, despite having a flat tire, the AP reports.

The AP also reports that defense attorney Steve Dehnart isn’t disputing the facts but told jurors that prosecutors don’t want to talk about why the accident happened.