A 23-year-old man accused of killing a 13-year-old boy and seriously injuring his mother, brother and one other is set to appear in court today.

Jeremy Webster faces first-degree murder and other charges in connection to what police are calling a "road rage" incident in Westminster.

According to police, Webster and 41-year-old Meghan Bigelow got into a road rage incident. Webster followed Bigelow for about a mile to a dentist’s office in Westminster. When Bigelow exited the car with her three sons, Webster confronted her.

The two got into a verbal argument and that’s when Webster allegedly pulled out a gun and shot the family. Webster also allegedly shot a man who was in his truck in the parking lot with his 9-year-old daughter. That man, John Gale, is expected to be okay. His daughter was not injured.

Bigelow and her 8-year-old son were taken to the hospital in critical condition.

Bigelow’s oldest son, Vaughn, was killed in the confrontation. According to arrest documents, Webster shot the family, walked away and then returned to shoot Vaughn again while he was lying on the ground.

Bigelow’s 12-year-old son, Cooper, was not injured in the confrontation and helped police track down his brother’s killer by telling police about what happened and the fact that his mother took a picture of Webster’s license plate.

A GoFundMe account has already raised nearly $70,000 for the family.

Westminster police say Webster confessed to the shooting and said he has mental health issues and just started a new medication that day.

Source: Denver7