HOUSTON -- A woman who shot at a man at a west Houston business with a bow and arrow while searching for her father suffered from a mental illness, her mother told KPRC Local 2 on Wednesday.

Houston police said Julie Parker shot Armando Silva, 49, at Texas Components along the West Sam Houston Parkway near Hammerly Boulevard on Monday afternoon.

Investigators said Parker was also armed with a toy gun and pointed it at two employees. Those employees, who have concealed handgun permits, shot her several times, police said.

Parker, 33, went into another room with the bow and arrow, detectives said.

An officer approached the room Parker was in and saw her point the bow and arrow in his direction and pull back on the bow, investigators said. The officer told Parker to drop the weapon, but she refused, police said.

The officer fired several shots at Parker, police said.

Parker was hospitalized in the intensive care unit and has been charged with aggravated assault with a deadly weapon.

Silva has been released from the hospital.

Parker's mother said her daughter has struggled with mental illness and was delusional during the attack.

Jennifer Oliver said the state's mental health system failed her daughter. She said that if that system worked, Parker may have been stopped.

"She has gotten some very good help through the mental health system. But, there's no follow-up after she's released from the system," Oliver said. "She has religious delusions and she thought that her father was an evil person."

Oliver said Parker's father, who works at Texas Components, was her original target.

Parker was released from Austin State Hospital six weeks ago, Oliver said.

"I'm hoping that Texas will allocate more funds for the mentally ill and will change their policies in dealing with both the families and the mentally ill individual," Oliver said.

Oliver said she told Austin police what her daughter was planning, but that officers told her they couldn't act unless something happened.