(NewsNation) — The discovery of a bloody knife, the purchase of hundreds of dollars of cleaning supplies and a reported car cleaning appointment are among new details the prosecution presented at the arraignment of Brian Walshe, husband of missing Massachusetts mother, Ana Walshe.

For the first time since she disappeared, there are also words from Ana, in the form of a letter she wrote to the judge in her husband’s federal art fraud case, expressing love and support for him.

“I am writing this letter to you to express my gratitude for having allowed Brian to spend the last eight months at home supporting his children and closest family members,” the letter read. “Brian has been working consistently on breaking the past habits of his family, and we are all looking forward to the new chapter of his life.”

Now, Brian has been charged with lying to police during the course of the investigation into his wife’s disappearance.

Investigators revealed they found possible evidence at a trash transfer station north of Boston near Brian’s mother’s home and evidence inside the couple’s basement.

Police found a broken knife and blood in the basement of the couple’s Cohasset home, the prosecutor said at his arraignment on Monday, although she did not say whose blood it was.

Sources also told NewsNation on Tuesday that a man by the name of Brian, but with a different spelling, made an appointment last week at a car detailing shop near his Cohasset home. The customer never showed.

Podcast “The Case” also published a voicemail, purportedly from Brian, to a friend of Ana’s on the day her work reported her missing.

“If you know anyone that may have had contact with her, you know I am trying to call everyone. I am sorry to bother you. I am sure everything is fine,” the voicemail said.

Brian was seen on surveillance video buying $450 worth of cleaning supplies at a home improvement store the day after his wife was last seen, a prosecutor said Monday.

The 47-year-old was held on a $500,000 bond on a charge of misleading investigators in connection with the disappearance of Ana. A not-guilty plea was entered on his behalf.

Brian did not tell police he had been to the home improvement store, where he bought mops, buckets, tarps, tape and other items on Jan. 2, assistant Norfolk District Attorney Lynn Beland said at the hearing in Quincy District Court.

Brian did tell police that he had been to a supermarket and a pharmacy when there is no evidence he had been to either store, she said. He misled investigators so he could either clean up or dispose of evidence, she said.

Brian’s attorney, Tracy Miner, asked for low or no bail, saying her client has voluntarily talked to police and consented to searches of his home, property and cellphone.

“He has been incredibly cooperative,” Miner said.

Ana, 39, a mother of three, was reported missing Wednesday by her employer in Washington, D.C., where the couple has a home and to which she often commutes during the week for work at a real estate company, authorities said.

She was last seen leaving her home in the early morning hours of Jan. 1, purportedly to take a ride-hailing vehicle to Logan International Airport for a flight to Washington, police and prosecutors said. But police have found no indication that she either took a vehicle or boarded any flight out of Logan recently.

Her cellphone has not been used, and there has been no activity on her credit or debit cards, Cohasset Police Chief William Quigley said at a news conference last week.

Authorities searched a wooded area near the family’s home on Friday and Saturday and then spent Sunday at the home.

Brian had been on home confinement while awaiting sentencing in a fraud case involving the sale of fake Andy Warhol paintings, according to federal court records. Cohasset police said Ana’s disappearance and her husband’s case appear to be unrelated.

The couple’s three young children are in state custody.