A Douglas County judge on Wednesday ordered a 31-year-old man to face a trial on five child sex crime charges.

District Judge Michael Malone made the decision after a preliminary hearing in which prosecutor Amy McGowan, a chief assistant district attorney, presented evidence that the man sexually abused one girl and attempted to abuse her younger sister when the girls lived in Lawrence from 2007 to 2009.

Police and prosecutors said the defendant is the ex-boyfriend of the girls’ mother and had lived with the family in Lawrence. The girls, who are now 13 and 11 years old, alleged the abuse occurred while their mother was at work.

According to testimony, the girls made allegations in 2010 about the abuse to family members, a social worker and police officers.

The man had a Garden City address when he was arrested last month in Finney County and brought to Douglas County to face the charges here.

He’s charged with three counts of aggravated indecent liberties with a child, one count of aggravated criminal sodomy and one count of attempted aggravated indecent liberties with a child. Malone scheduled an arraignment on the five charges for 4:30 p.m. Monday.

The Journal-World generally does not identify sex crime suspects unless they have been convicted.