An Irving toddler has died two days after she was found strangled, along with her five-year-old brother. The two-year-old girl was declared dead last night at Children’s Medical Center in Dallas. Monday afternoon, Irving police were called to an apartment where the mother said she had hurt her children. Officers found the brother and sister had been strangled, apparently with a length of wire. The boy was dead and his sister was kept on life support until last night. Their mother is now locked up on capital murder charges. CPS investigated the family last year after the woman left her then four-year-old son home alone. Case-workers looked into it but determined there was no reason to take any action. An uncle tells the Dallas Morning News the mother was recently depressed and told him she saw “…strange things…” in the family’s home.