...dosage was changed about two weeks before the stabbing after he complained that the drugs were making him sluggish. Delores Fischer, who is Norma Thirlwall's sister-in-law, told authorities that he had acted strangely before the Thirlwalls...

...Thirlwall, 41. He had been under treatment for a mental disorder, and had told his mother's sister-in-law, Delores Fischer, minutes before the attack that he intended to kill his mother, a criminal complaint alleged. While refusing to...