killer. >> never. never. never. i just know igor is not capable of murder. >> reporter: and another friend, jayshree bihari, remembered how close anna and igor always were. >> she just adored him. her son was like the center of her life. >> reporter: what did she tell you about her son? >> you know, she just said that, "i want him to pursue his passion, which is in music." and she would always go to his concerts. >> reporter: igor played guitar in a christian rock band, combining two big interests -- music and religion. he was studying speech pathology at the u.t. dallas, the same school where his mother worked. >> she used to even wash his clothes on weekends and when he was at the dorm. >> reporter: he's in college and she's still doin' his laundry. >> yes. she will take all his clothes, wash them. iron them. get him some food, homemade food and stuff like that. >> reporter: the last time donna