This week marked a terrible anniversary for Maple Ridge乌鸦传媒檚 Sandra Gagnon.

It was 20 years ago on Sunday that police raided the Port Coquitlam farm of Robert 乌鸦传媒淲illie乌鸦传媒� Pickton, and for the first time she began learning about the serial killer who is believed responsible for her sister乌鸦传媒檚 disappearance.

Monday was also a tragic anniversary 乌鸦传媒� the day when her son, who was 23, took his own life.

Her sister Janet Henry, who lived in Vancouver乌鸦传媒檚 Downtown Eastside neighbourhood and had reportedly worked in the sex trade, had been missing since June of 1997.

乌鸦传媒淲e were going to go out that week, but she didn乌鸦传媒檛 call me,乌鸦传媒� she recalled.

Gagnon got no return phone calls, which was very unusual. As she started asking questions, Gagnon knew something was wrong. Henry, 34, had left her place, leaving all her possessions, and nobody saw her return. Her bank account still had money in it. Nobody could say what had happened to her.

乌鸦传媒淭he not knowing was really ugly,乌鸦传媒� said Gagnon.

Pickton乌鸦传媒檚 farm became the focus of a large-scale police investigation in February of 2002. Ultimately, the case would result in 22 charges of murder against Pickton. He was convicted in 2007 on six counts of second-degree murder, but is suspected of having many more victims, based on evidence found at the farm.

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It has never been proven that Henry was one of Pickton乌鸦传媒檚 victims, but her face was one of 64 on a poster of missing women from the DTES. A Missing Women乌鸦传媒檚 Task Force believes her disappearance was tied to Pickton.

乌鸦传媒淲e haven乌鸦传媒檛 got any answers, but the task force is almost certain that Janet ended up there. They know more than we do, but they don乌鸦传媒檛 tell us everything,乌鸦传媒� she said in 2011.

Gagnon testified before a Missing Women Inquiry that investigated the disappearances of 67 B.C. women. She was in regular contact with investigators, pressing them for information, and keeping the memory of her sister alive.

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Gagnon had grown up in Alert Bay until the age of 12, when she moved to Vancouver with her mother and siblings. Little Janet was the youngest of 13 children, four years younger than Gagnon.

Henry also lived in Maple Ridge, working as a hairdresser. Gagnon said her sister she had wanted to quit using drugs and alcohol, and reconnect with her loved ones.

The sisters were close, and on a tough anniversary, it乌鸦传媒檚 not hard for Gagnon to conjure up a memory of better times.

乌鸦传媒淚 just think about how loving she was, and how she was there for me and my kids,乌鸦传媒� she said. 乌鸦传媒淚 remember how she used to come to visit me, and go picnicking down at the Port Haney docks.乌鸦传媒�

To deal with the loss of her sister, and her son, Gagnon said she would start putting her thoughts and experiences down on paper.

乌鸦传媒淚 try to be strong, but losing a child is the worst thing in the world,乌鸦传媒� she said.

乌鸦传媒淚乌鸦传媒檓 going to write a book. Starting today. Hopefully it乌鸦传媒檚 a book that will tell women that they can get through anything.乌鸦传媒�