THE mother of missing Pyramid Hill woman Krystal Fraser has urged the person responsible for her daughter's disappearance to "grow a conscience" and come forward.
It comes as Missing Persons Squad Detective Acting Inspector Julian Horan revealed someone called Krystal 15 times from a pay phone in Leitchville between May 2009 and her disappearance on June 20, 2009.
The pair faced media on Wednesday morning to announce a $1 million reward, as reported in today's Bendigo Advertiser, in the hope of encouraging someone to come forward with information.
The total is up from $100,000 offered in June 2012.
Krystal was days away from delivering her first child - a son - when she was last seen.
Detective Inspector Horan said police had not been able to establish who had made the 15 phone calls to Krystal's mobile.
He said no one had called Krystal's mobile from the Leitchville phone booth since the day she went missing.
Two of the phone calls occurred the night before her disappearance, and when she was in a Bendigo hospital the day she went missing. Krystal had intended to give birth at Bendigo Health.
Hospital staff were among those Krystal had told about plans to attend a party in Cohuna the night she disappeared.
Leitchville is 27 kilometres from Pyramid Hill and about 10 minutes from Cohuna.
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"Calls to Krystal's mobile phone, from the Leitchville phone booth, the night prior to her disappearance and while she was at the hospital; lead us to believe they relate to the 'party' she mentioned to hospital staff," Detective Inspector Horan said.
He said a 40-second phone call Krystal received on her mobile phone on the night she vanished was important to their investigations.
"We know it was from a public phone booth outside the Leitchville Post Office in Findlay Avenue at 11.59pm, on 20 June, 2009," he said.
"We also know Krystal's phone last showed activity on a Leitchville phone tower at 2.49am, nearly three hours after she received the call from the phone box. This indicates to us that the phone was in the Leitchville or surrounding area."
Detective Inspector Horan said investigators strongly believed the caller was the last person to speak to Krystal prior to her disappearance.
"I believe this caller holds the answers to what happened to Krystal and may be the father of Krystal's unborn child," he said.
Police have not been able to locate Krystal's mobile phone.
Krystal's mother, Karen Fraser, said it was uncharacteristic for her daughter to stop using her phone.
"This is a girl who rang and texted me 100 times a day," she said. "She didn't just stop texting. She stopped texting me because she's not able to."
Mrs Fraser remembered her daughter as a wonderful person.
"She had a heart of gold but she was very naive," she said. "People took advantage of her and unfortunately this is what's happened."
Mrs Fraser said her daughter's disappearance had destroyed her family. She described the past 10 years as miserable.
"How do you come back from that?" she said.
"I just take each day as it comes. I have other children, I have other grandchildren, I've got a husband, but it's taken its toll."
Detective Inspector Horan and Mrs Fraser both described Krystal's disappearance as the actions of a monster.
Detective Inspector Horan said the party in Cohuna might have been a guise to lure Krystal to a location where she had met with foul play.
"We're looking at the possibility that the intimate relationship she shared with a man and the subsequent pregnancy may have caused the male some concern, which ultimately has led to her disappearance and death," he said.
"You would say it is monstrous. It is despicable and whoever's done this, you would think, has probably the most selfish of motivations to look after themselves."
"Why would you kill a pregnant woman?" Mrs Fraser asked.
"There's nothing anybody could do that you could make a decision to kill somebody. There's no reason for that. She wouldn't hurt a fly. She would have given you the shirt off her back.
"And somebody like Krystal - she wouldn't have hurt anybody. In this day and age if she was saying they were father of a child, a normal person would say get DNA. Why would you murder her over that?
"I just - I don't understand it. I don't understand what's happened to her. I know as much today as I did then, which is she just disappeared into thin air."
Mrs Fraser said she just wanted to know what happened to her daughter.
"It gives me closure, doesn't it," she said.
"Most people, if they lose a loved one it's an accident or they get sick, they've got time to prepare. I've got nothing. I don't even know where she is. How can you get over something like that? You can't grieve, you can't do anything. You're just in limbo, you just sit and wait."
Mrs Fraser urged the person who knew what happened to Krystal to come forward.
"Grow a conscience," she said. "She was our daughter. She had a brother and sister, she had grandparents. You took all of that away from us and we don't know what happened. Grow a conscience."
Krystal was well known in the Pyramid Hill community. She was described as 167 centimetres tall, with short brown hair and crooked teeth.
One of the heavily pregnant woman's last known movements was travelling from Bendigo to Pyramid Hill on a V/Line train.
Detectives established that Krystal got off the train at the Pyramid Hill Railway Station about 8.40pm the night she vanished.
She was last seen alive leaving an address in Albert Street, Pyramid Hill, about 9.30pm, after vising an acquaintance.
Police said Krystal had been wearing an orange top, black tracksuit pants and a camouflage-patterned baseball cap.
Investigators believe Krystal was murdered. But her remains have never been recovered.
A flyer posted on the windows of several businesses in Pyramid Hill in 2009 said Krystal had a deep voice and was streetwise, friendly and trusting. The flyer said Krystal had epilepsy and asthma.
She also lived with a mild, undiagnosed intellectual disability - the result of bleeding on her brain at birth.
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