I am unable to find anything on a Lisa Marie Triggs...but have found some info on a Lisa Rene Triggs.
I found a clip from an article from the Washington Post, July 6, 1987. Unfortunately, I am not able to find it on the actual website for the post. It seems like the had a suspect, but didn't have enough evidence to make an arrest.
http://www.encyclopedia.com/doc/1P2-1331366.html
After conducting 2,000 interviews and devoting hundreds of hours to their investigation, Prince William County police say they have a chief suspect in the slaying of 15-year-old Lisa Renee Triggs last year but lack the evidence to justify bringing charges.
Triggs, a sophomore at Osbourn Park High School near Manassas, had been shopping at Center Plaza and persuaded her mother to allow her to walk home alone to meet friends there. She was last seen about 7:30 p.m. on May 21, 1986.
She was found three days later face down in a creek behind the shopping center, dead of blows to …
This is all that I was able to read on the site. I wonder how it went cold even though they had a POI. You'd think maybe if they went back and re-examined all the old evidence, that with today's new technology, they might be able to finally have enough evidence to make an arrest.
OT: I lived in Woodbridge for several years in the Mid 2000's and grew up in Alexandria and I am constantly amazed at all the murders that never got a lot of local media attention. I never heard about Lisa. I remember hearing about the Spotsy murders and that was even farther out. Hmm.
