An Illinois woman who admitted suffocating her 3-year-old autistic daughter, with a plastic bag was found guilty Thursday after jurors did not agree with her insanity plea.

Defense attorney Marc Wolfe sustained that his client, Karen McCarron was deeply depressed and became delusional the day she killed her daughter Katherine “Katie” McCarron on May 13, 2006.

Tazewell County Chief Assistant State’s Attorney Kevin Johnson said McCarron was a selfish woman who wanted to free herself from treating her daughter suffering from autism.

People with autism often struggle to control impulses and children with autism can be difficult to take care of.

In a videotaped confession played during the trial, McCarron told police she could no longer deal with her daughter illness and she thought she could “fix” her so in heaven she “would be complete,” she said two days after Katie’s death. Some witnesses testified that McCarron her daughter’s condition had been a reason of embarrassment for her.

It took nine hours over two-day period to jurors to deliberate on the case. At the end, they found McCarron guilty of two counts of murder, obstructing justice and concealment of a homicidal death. She faces up to 100 years behind the bars when sentenced on March 6.

“I don't believe that the verdict rendered by the jury is consistent with the evidence,” the Associated Press quoted defense attorney Marc Wolfe. He also added that it was too early to consider an appeal.

Paul McCarron, the woman’s husband testified that she was struggling with suicidal thoughts while taking depressants. The psychiatrist the woman had seen agreed that she was severely depressed, but they could not tell if she knew what she was doing when she killed Katie.

McCaron suffocated her daughter in her parents’ home. She then brought Katie back home, carried the little girl past relatives as if she was asleep and laid her down in a bedroom. She then told family a while later, apparently panicked, that she could not wake her daughter.

When called, emergency workers found Katie not breathing. Police considered McCarron a suspect only after emergency workers came to the house the second day to treat the woman for an overdose of over-the-counter drugs.

Paul McCarron has filed for divorce. A woman answering his home phone and identifying as a family member said that she is relieved that “justice has been done,” while a woman answering the phone at the house of McCarron’s mother declined to comment, the AP reported.