A 46-year-old Baltimore man pleaded guilty on Tuesday morning to killing two women crossing the street in downtown D.C. last December, the U.S. Attorney’s Office of D.C. announced in a press release.

Gerard D. James was driving an Eyre Bus Company tour bus when he made an illegal left turn at 7th Street and Pennsylvania Ave NW on December 19, 2018, just before 10 at night, prosecutors allege. As he turned onto Pennsylvania, he struck and killed Monica Carlson, 61, and her mother, Cora Adams, 85, who were crossing the street in the designated crosswalk. Carlson was the mayor of Skagway, Alaska, a town of about 1,000 people about 100 miles north of Juneau.

James has pleaded guilty to two counts of negligent homicide and could be sentenced to up to four years in prison. Without the plea agreement, James could have faced up to 10 years in prison, per the Washington Post.

The incident was captured by District Department of Transportation cameras, as well as two cameras on the bus—one forward-facing camera mounted on the windshield and another facing the driver, per the USAO. The camera facing the inside of the bus showed that, as James turned, his cellphone rang, and he picked it up with his left hand and then transferred it to his right hand. The impact when James struck the two women can be heard on that video, according to the USAO. The forward facing camera showed that as James traveled up 7th Street NW, southbound traffic on the street was traveling through the intersection, which means James ignored a red arrow signal and turned left illegally, per prosecutors.

The women had a “walk” signal, and were walking in the crosswalk when they were struck. They had come to D.C. to visit the White House and see the Christmas decorations, per the USAO.