The latest in a long list of appeals filed by convicted teen killer Lisa Michelle Lambert was denied this week by the state Superior Court.

That leaves few remaining options for relief for Lambert, who is serving a life sentence for the Dec. 21, 1991 murder of 16-year-old Laurie Show.

Lambert, now 39, has proclaimed her innocence and appealed since her initial trial conviction in July 1992.

Earlier this year, she filed an appeal, acting as her own attorney, again claiming "misconduct" by police and prosecutors.

The one new piece of alleged evidence is a note written by a convicted felon that includes a statement allegedly made by the attorney who prosecuted Lambert, the late Jack Kenneff.

Kenneff, after becoming a defense lawyer, allegedly made a statement in 2007 to Warren Raffensberger Jr. that Lancaster County's judicial system "is corrupt," Lambert says in the appeal. Raffensberger wrote a 4-page note about that statement, which Lambert attached to her appeal.

In February, Lancaster County Judge Dennis Reinaker ordered that the appeal was filed years after deadline, and that the new "evidence" didn't warrant an exception to that deadline. The judge calls the alleged statement "inadmissible hearsay" and notes that Raffensberger has been convicted of multiple crimes, including felony tampering with public records.

The state Superior Court, in a nine-page opinion written by Judge Eugene B. Strassburger, confirms Reinaker's decision.

Lambert, residing at a medium-security prison in Massachusetts, still has the option of appealing to the state Supreme Court.

In the opinion of many locals, the Show killing was Lancaster County's "Case of the Century," which included a love triangle that led to murder and Lambert's shocking (albeit brief) release from prison in April 1997.

Lambert, along with convicted accomplice Tabatha Buck, killed Show at the Conestoga Valley sophomore's East Lampeter home as she prepared for school.

Lambert, who viewed Show as a romantic rival, was convicted of slashing Show's throat. Buck was convicted of assisting in the murder: in particular, holding Show inside the condominium at The Oaks.

Both women are serving life terms with no chance for parole.

Lawrence Yunkin, Lambert's boyfriend who once dated Show, pleaded guilty to third-degree murder and has since been released.

Lambert's latest appeal outlines, along with the Raffensberger statement, multiple instances of alleged misconduct by police and prosecutors.

The instances of "misconduct" argued by Lambert include:

• The plausibility that Show made a "dying declaration" to her mother that Lambert killed her.

• The alleged swapping of evidence at the murder scene, specifically a pair of black sweatpants.

• That Lambert was allegedly framed by police officers who raped her.

• The significance of an earring found at the murder scene that Lambert's defense team argued belonged to Yunkin.

Ultimately, the high court found that none of those claims were new or valid.

Lambert has filed a number of appeals since a local judge convicted her of first-degree murder. Most notable was a decision by U.S. District Court Judge Stewart Dalzell declaring Lambert "actually innocent" and granting a petition for release.

That ruling eventually was vacated and Lambert was locked back up after being free for eight months.

bhambright@lnpnews.com