The odd single stab wound murder,in an area with other people nearby certainly is odd,and unusual. Coincidentally, the link you provided was from a Zodiac killer forum, and Zodiac is considered by many to be a suspect in the case of Cheri jo Bates, who some,including myself, have tried to connect to the Aardsma case. There's no solid evidence thatthe Bates case and Aardsma cases are linked,but there are some interesting paralells...
Bates was killed in 1966 in Riverside at her college library(outside in the lot). Police held as possible evidence, a desktop poem that mentioned a girl in a red dress.The desktop poem was signed RH. Taunting letters were mailed to authorities in the Bates case.
Aardsma was killed at her college library(inside),and she was wearing a red dress. Police found an odd poem written on a nearby desk in the Aardsma case. The prime suspect was a guy with initials RH. Years later, a taunting letter was received in the Aardsma case.
Again, the paralells are interesting, and maybe one of the most unique types of coincidence you will ever see. I have looked into the RH suspect in the Aardsma case,and can not link him to the Bates case in CA.
The Zodiac killer was considered by many,including a prominent state documents expert, to have written teh desktop poem in the Bates case in 1966. He went on to write taunting letters demaning to have his letters published in the newspapers. His first such letter asked to be published "in the Friday paper"
The coincidences continue.....RH,the suspect in the Aardsma case,was from Lancaster PA. A girl named Lindy Sue Biechler was killed in Lancaster in the mid 70's,she was stabbed to death. Soon after, a letter was sent to the police. The author asked for it to be published "in the Friday paper".
Lots of interesting things sorrounding these cases,but nothing solid or concrete connects them