The highest court in Massachusetts is hearing arguments in a case that could determine the fate of thousands of people convicted of drug crimes based on tainted evidence.

The American Civil Liberties Union says many of those affected are afraid to vacate their guilty plea and seek a new trial because they can be prosecuted for crimes dropped when they entered their plea deal.

The ACLU will argue Thursday morning that the Massachusetts Supreme Judicial Court should declare that any defendant who seeks a new trial cannot be convicted of a more serious offense or given a longer sentence.

The case comes after former state drug lab chemist Annie Dookhan admitted she faked test results and tampered with evidence.

Dookhan was sentenced to at least three years in prison in 2013.

The Republican-led Congress appears ready to approve the Keystone XL oil pipeline, but no matter what actions are taken in Washington, the entire 1,179-mile project could be delayed until Nebraska signs off on the route.

After several years of intense debate, the routing process is before the Nebraska Supreme Court, and depending on how the justices rule, months or years could pass before construction begins in that state.

Even if approval comes from Washington and the high court, opponents are looking for new ways to block the project, including filing a federal lawsuit on behalf of Native American tribes in Nebraska and South Dakota over the possible disruption of Indian artifacts.

The court is considering whether an obscure agency known as the Nebraska Public Service Commission must review the pipeline before it can cross the state, one of six on the pipeline's route. Gov. Dave Heineman gave the green light in 2013 without the involvement of the panel, which normally regulates telephones, taxis and grain bins.

The justices have given no indication when they will render a decision.

President Barack Obama has said he is waiting for the court's decision, and the White House on Tuesday threatened to veto the bill in what was expected to be the first of many confrontations with the new Congress over energy and environmental policy.

Argentina's Supreme Court has ruled that an American who took refuge and started a new life in the South American country can be extradited to face charges that he killed his wife over a decade ago, a court spokeswoman confirmed Saturday.

Kurt Sonnenfeld moved to Argentina in 2003 and sought asylum after prosecutors in Denver charged him with first-degree murder. The decision to extradite him brings to an end a longstanding dispute between the U.S. Justice Department and Argentine courts that centered in part on differences over the death penalty.

In the ruling, which was made Dec. 11, the justices said U.S. prosecutors had assured Argentina that "the death penalty will not be imposed, or if it were ruled, it will not be exercised in this case." The ruling said the executive branch will have final say on an extradition and doesn't specify when it may take place.

Maria Bourdin, a spokeswoman for Argentina's Supreme Court, confirmed the ruling but declined to comment beyond what was in it. Calls to the U.S. Embassy in Buenos Aires on Saturday seeking comment were not immediately returned.

A man who eluded police for 48 days after allegedly shooting to death a state trooper and wounding another is due in court for a preliminary hearing which could decide whether his case goes to county court for trial.

A Pennsylvania district judge must decide Monday whether there are sufficient grounds to send the case against Eric Frein, 31, to county court.

Frein has been charged with shooting Cpl. Bryon Dickson and Trooper Alex Douglass Sept. 12 outside their state police station in northeastern Pennsylvania. He was captured Oct. 30 at an abandoned airplane hangar in the Pocono Mountains.

Authorities say Frein confessed to what he described as an assassination designed to "wake people up" and result in a change in government. Dickson was killed and Douglass was wounded.

Prosecutors are seeking the death penalty. Frein was identified as a suspect shortly after the shootings when a passer-by found his vehicle partially submerged in a small pond near the state police station.

The manhunt, with drew a large police force to the rural area, frightened residents as there were numerous reported sightings of Frein, an expert marksman. A team of federal marshals performing a systematic search stumbled across him about 30 miles from the scene of the shooting and were able to arrest him.