Concord teacher Howie Leung at a bail hearing at Middlesex Superior Court in Woburn, Massachusetts, Tuesday. 
Concord teacher Howie Leung at a bail hearing at Middlesex Superior Court in Woburn, Massachusetts, in 2019.  Credit: Lisa Redmond—Union Leader/pool

More than a year after Merrimack County prosecutors charged former Concord school district teacher Howie Leung with repeatedly sexually assaulting a student, the prosecution against him has yet to proceed.

The charges against Leung, filed last September, followed a 2023 guilty plea on related charges in Massachusetts, where he is currently incarcerated.

Both the prosecutor and Leung himself could request through an interstate agreement that he be transferred to New Hampshire so that his case here could be adjudicated while he serves his Massachusetts sentence, but neither side has done so, according to a spokesperson for the New Hampshire courts.

If Merrimack County prosecutors continue to hold off on their case until Leung is released in Massachusetts, the proceedings would occur 15 or more years after the first alleged sexual assaults in Concord.

Merrimack County Attorney Paul Halvorsen declined to comment on his office’s handling of the case, citing the fact that it remains open.

An employee at New Hampshire’s Public Defender declined to identify the lawyer representing him. The attorney listed on the court portal as representing Leung is no longer employed by the public defender’s office, the employee said.

Leung, now 42, served as a special education teacher at Rundlett Middle School and Concord High School from 2006 to 2019. He pleaded guilty to raping a Concord student at a summer program at the Fessenden School in Newton, Mass. in 2015 and 2016.

Merrimack County prosecutors allege Leung also repeatedly sexually assaulted the student in Concord, starting when she was 12 or 13 years old.

Leung continued to work in Concord schools for another four years, until Concord High students reported seeing him kiss another student in late 2018. The district’s handling of the case led to the resignations of former superintendent Terri Forsten and principal Tom Sica.

Although Leung was arrested and charged in Massachusetts in 2019, he did not plead guilty until 2023, in part because of pandemic-related delays. He is currently serving a six- to seven-year prison sentence and is eligible to be released starting in March 2029.

As the Massachusetts case remained pending, New Hampshire prosecutors held off on bringing charges against him.

“Back when this case broke, Massachusetts was going to be the lead on the investigation because more of the serious crimes happened in Massachusetts,” former Concord Deputy Chief John Thomas previously told the Monitor. “We didn’t want to move forward with charges here until that case was resolved.”

Last September, a Merrimack County grand jury indicted Leung on 39 counts, including felonious sexual assault, aggravated felonious sexual assault, criminal restraint, witness tampering and falsifying physical evidence.

An investigator hired by the school district determined Leung also engaged in a sexual relationship with the student he was seen kissing in 2018, but all of the sexual assault charges against him pertain to his abuse of the first student.

After a court appearance last December that Leung failed to attend due to his incarceration in Massachusetts, prosecutors requested an arrest warrant for him “to facilitate the interstate process,” Merrimack County Superior Court Judge John Kissinger wrote in an order.

Though the warrant was issued, no additional entries have been made on the public court docket in the case since. Paperwork pertaining to the interstate agreement on detainers “has not been filed,” David Marquis, the assistant communications manager for the Office of the Courts, wrote in a statement on Friday.

“If it is filed, we will comply with the relevant statutes and schedule accordingly,” Marquis wrote.

Albert Scherr, a criminal law professor at the University of New Hampshire’s Franklin Pierce School of Law, said it was “not unusual” for a prosecutor to decline to proceed on a case while the defendant is incarcerated in another state.

“They could, but they don’t have to,” Scherr said in an interview. “It’s really their call.”

“They may be thinking: As long as he’s being held in Massachusetts, we’re not really confident about the strength of our case, so let’s let him be dealt with in Massachusetts,” he added. “That’s a possibility — I don’t know whether that’s the case or not.”

Jeremy Margolis is the Monitor's education reporter. He also covers the towns of Boscawen, Salisbury, and Webster, and the courts. You can contact him at jmargolis@cmonitor.com or at 603-369-3321.