KANSAS CITY, Mo. (AP) – A nail salon manager has been convicted of setting a fire that killed two firefighters in Kansas City.

A  Jackson County circuit judge on Monday found 46-year-old Thu Hong Nguyen guilty of two counts of second-degree murder, second-degree arson and second-degree assault.

Her sentencing is scheduled for Sept. 14. She could be facing to up to 30 years in prison for each murder charge.

Forty-three-year-old Larry Leggio and 39-year-old John Mesh were killed when a brick wall fell on them as they fought a fire at a three story building containing Nguyen’s nail salon in October 2015.

Two other firefighters were seriously injured.

Authorities say Nguyen lit a fire in the salon’s storeroom and that she was the last person seen leaving.