"Not a day goes by I don’t think about it," 50-year-old Chad Burgette said of the day back in 1978 when he found his 16-year-old sister, Robbin, brutally murdered inside the Phoenix apartment that they shared with their mother.

Burgette was 11 years old.

"The vision is very clear in my mind," Burgette said.

The 38-year-old murder of Pauline "Robbin" Burgette has been a cold case for decades, but now Burgette is teaming up with Silent Witness and veteran Phoenix Police Detective Clark Schwartzkopf to try and breathe a little life into the investigation.

"We have forensic evidence in this case from an unknown source," Schwartzkopf said. "We’re just looking for the right path to take."

It happened at a duplex near 26th Street and McDowell Road.

Robbin was last seen by friends and neighbors on March 11, 1978. It's believed that she was home alone that night. Brugette discovered her body in her bedroom the next evening. She had been stabbed several times. Police believe she might have been sexually assaulted, as well.

Anyone with information about the murder of Robbin Burgette is encouraged to call Silent Witness; a reward of up to $1,000 is on the table.

"I’m not sure you can really bring closure to this," Burgette said. "But it has been 38 years; I think the person who did it has been free long enough."

If you know anything about what happened to Robbin Burgette, call Silent Witness at either 480-WITNESS (948-6377) or 1-800-343-TIPS (8477). Spanish speakers may call 480-TESTIGO (837-8446). (Click or tap phone number to call from this story on your mobile device.)Copyright 2016 KPHO/KTVK (KPHO Broadcasting Corporation). All rights reserved.

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