CHARLOTTE, N.C. (AP) — Police in North Carolina have charged a motorist in a four-car crash that killed a mother and her 3-year-old son.

Charlotte-Mecklenburg police said in a news release that 27-year-old Alicia Shanell Mcfarland and her son died Friday when their car was hit head-on by a van that was sideswiped by another driver. Mcfarland's car also was hit by a pickup truck.

Authorities said 22-year-old Montressa Gray caused the accident when she hit the van while changing lanes. She wasn't hurt.

Gray is free on $10,000 bail on two counts of misdemeanor death by vehicle. It's not known if she has an attorney.