MANCHESTER – While Superior Court Judge Daniel St. Hilaire was overseeing the jury selection process Monday for Amherst resident David Trombly’s attempted arson trial, court officials were in the process of crafting a warrant for Trombly’s arrest.

Trombly, 33, is accused of setting on fire the Amherst home in which his younger brother, John, shot and killed their mother before turning the gun on himself in September 2014.

According to the case summary in Trombly’s court file, jury selection took place Monday, but he failed to appear in court, prompting another judge to issue the arrest warrant.

Trial itself, which was scheduled to start Tuesday, was canceled, according to the summary.

The 2014 murder-suicide was as unexpected as it was tragic for those who knew Elizabeth Trombly, a popular reading specialist at a Brookline elementary school. It also shocked neighbors of the 1 Meadow Lane home where she, her son John and sometimes her son David lived for years.

But on the night of Jan. 5, 2018, David Trombly, who became the owner of 1 Meadow Lane in 2016, allegedly poured gasoline on the floor of the ranch-style home in what authorities allege was an attempt to burn the house down.

Along with the attempted arson charge, Trombly also faces one count of breach of bail conditions, a misdemeanor that accuses him of violating stipulations set upon his November 2017 arrest for possession of cocaine.

The case summary indicates lawyers came at least fairly close to settling the matter in June 2018 and again in October 2018.

In June, Judge Amy Messier issued a dispositional conference order, which continued the hearing and led to a final pretrial hearing in September.

In October, Messer granted a defense motion to continue the hearing, after Trombly allegedly failed to appear for that plea and sentencing hearing.