North Haverhill — The 28-year-old Lebanon man accused of burning down the First Baptist Church of Lebanon on Dec. 28 has been indicted on a felony arson charge.

A Grafton County grand jury also indicted Anthony Boisvert on a second felony arson charge and attempted arson, as well as two counts of first-degree assault and two counts of tampering with witnesses.

Those charges allege Boisvert lit a couch on fire in the basement of 68 Mascoma St. after he left the church, assaulted Wade Bennett and Dianne Faughnan with a knife in the days after the church incident, and did so in retaliation for Bennett and Faughnan giving information to the police.

The additional arson charge stems from a fire set at 165 Hanover St. Extension in January 2016.

Boisvert, who is currently being held on high bail, will be arraigned on the charges on April 10 in Grafton Superior Court in North Haverhill.

Meanwhile, the same grand jury also indicted Boisvert’s sister, Andrea Gilbert, on a felony charge of falsifying physical evidence.

Police accuse Gilbert of sending a remote signal to her cellphone that erased all of its data with the intent to impede the investigation into her brother’s alleged misdeeds. She too will be arraigned on April 10 in the North Haverhill courthouse.

Indictments are not a finding of guilt, but rather a finding by a grand jury that there is sufficient evidence for a prosecutor to proceed with a criminal case.

According to First Baptist Church’s website, the congregation is still temporarily holding its services at Lebanon Middle School.