That ain't going to happen," Ernie Raines said. "I'm doing everything I can to try to get her away from him. . . . I'd like to say to him: Stay away from my daughter, take his ring back and look for his wife before he's out trying to get another young girl."
Peterson, 54, is suspected in the 2007 disappearance and "potential homicide" of his fourth wife, Stacy, who was 23 at the time. He recently got engaged to another young woman, reportedly 24-year-old waitress Christina Raines, despite still being legally married to his missing wife.
Peterson is also being investigated in the 2004 death of his third wife, Kathleen Savio.
Ernie Raines told the Sun-Times that Peterson met his daughter years ago at a Bolingbrook laundromat and that he has given her roses, taken her to "Blue Man Group" and promised to buy her a car.
Ernie Raines said his daughter told him about Peterson's proposal when he spotted a ring on her finger Friday.
"I said, 'You need to take that back. If you don't want to, I will,' " said Ernie Raines, 53. "I said, why would you want to marry someone like that anyway? He's my age for Christ's sake."
Concerned about Peterson -- "I don't want a third one to come up missing" -- Ernie Raines said he drove to Peterson's house last month to "let him know that I'm here, that I'm around, that I know where he lives."
Ernie Raines thinks his daughter sees security with Peterson. "He's got a house. He's got money."
But, as a father, he sees troubles.
"I said, if you don't answer your [cell] phone, don't worry about it," Raines said. "I'll drive my Cadillac right through his house."