In the past five years, since corrections officer David McGuinn was stabbed to death at the hulking House of Correction in Jessup, there have been major changes in Maryland's corrections system — new prisons built, new programs added and tighter controls to rein in gangs and contraband. The House of Correction itself, once notorious for violence and corruption, has been closed and is set to be torn down.

Yet one thing hasn't changed: The two prisoners accused of killing McGuinn still haven't come to trial.

Monday marks the five-year anniversary of the slaying of McGuinn, a by-the-book officer and father of three. Many of those familiar with the case have been frustrated by the delays in prosecuting the men accused of killing him, and former colleagues wonder why no one has yet been held accountable.

"Shame on the system. It's a blight on the criminal justice system that neither of them have gone to trial yet," said Patrick Moran, director of AFSCME Maryland, a collective bargaining unit for correctional officers. "I understand that people have their rights, but it's unacceptable."

For McGuinn's family and correctional officers, the case ought to be put to rest, he said.

Laura Blankenship, president of the local union, said the message that correctional officers are getting is that "we can be killed in the line of duty and nothing happens."

The prosecutions of Lee Edward Stephens and Lamarr C. Harris have been stalled for a variety of reasons, including battles over medical records and the difficulties of scheduling a 10-week trial. Another delay occurred because the wife of a defense attorney was scheduled to give birth. Most notably, Maryland legislators rewrote the state's death penalty law in 2009, and that has led to a new set of legal challenges.

In the meantime, Stephens, 32, and Harris, 41, continue to serve their life-plus sentences for murders committed while they were teenagers.

Legal experts say that the two cases are working through the weighty and time-devouring issues that have always come with capital cases. But now, the state's new death penalty law — which limits the cases in which prosecutors can seek capital punishment — will face its first major challenges.

That carries even more potential for delay, said Scott Shellenberger, the state's attorney for Baltimore County.

"I certainly understand that the law has changed in the interim, but 5 years is way too long before you get to trial," said Shellenberger, who is not involved in the two cases. "Now there are four new ways for lawyers to muck it up. Good lawyers are going to challenge it, based on the new law."

Memory lives on

For the first few years after McGuinn was killed, on one evening each July, somber correctional officers, flickering candles in hand, gathered outside the House of Correction to remember their fallen colleague. There was no vigil last year; but the union's local is planning an event for Monday night.

McGuinn's memory lives on in other ways: his name is on plaques, on the signpost of a road entering the Jessup prison complex, and on faded T-shirts remembering him as a "fallen hero."

By all accounts, the 42-year-old, nicknamed "Homeland Security" by coworkers, was thought of as a humble and serious man. He was so private that only after he was killed did people who worked alongside him know that he had children — a daughter, son and stepdaughter — and a large family in Atlantic City, N.J.

Only if they'd read his obituary in his hometown newspaper would they have learned that his family tree includes Matthew Henson, known as one of the first Arctic explorers to reach the North Pole, and that he had worked in Atlantic County as a certified emergency medical technician.

McGuinn's relatives did not respond to interview requests for this article or could not be reached.

On July 25, 2006, McGuinn was taking head counts in the prison's west wing when he was attacked from behind shortly before 10 p.m. He was on Tier E4's narrow, cell-lined catwalk when he was repeatedly stabbed.

A day later, Stephens and Harris were charged in the death. In the statement of charges, Maryland State Police said Harris was identified by a witness and that clothes of both prisoners were bloody. Public safety officials said it appeared that one of the two inmates had a tool used to tamper with cell door locks. Prosecutors have never offered a motive for the attack.

Since the arrests, the cases have become a legal odyssey.