Lindsay Clancy Mistrial

Lindsay Clancy's ex-husband is speaking out after her case ended in a mistrial ... saying the deaths of their three children are something he'll never recover from.

Patrick Clancy issued a statement through his attorney expressing gratitude to the judge and jurors for their work throughout the trial. "Patrick Clancy is grateful to the Court and to the jurors for their hard work, their commitment, and their perseverance," the attorney said.

He added ... "The loss of Patrick's children is something from which he will never recover and from which there will never be closure."

Donald Trump is keeping tabs on the Lindsay Clancy trial … and spoke out hours after the court ruled a mistrial.

On Friday, the President was questioned about Lindsay’s case. He told reporters, “She did a horrible, horrible thing, can’t be worse, but you’ll find out what the price to pay is.”

Trump continued, “There’ll be a price. It’s going to be a mental institution or jail or something, but I guess they’re going to go through another trial.” 

Lindsay Clancy's mistrial has a ton of people heated ... including TMZ's own Harvey Levin and defense attorney Mark Geragos.

The pair had it out Friday afternoon on their weekly podcast after Judge William F. Sullivan declared a mistrial in the case Friday morning ... and Harvey thinks the D.A. will think twice before asking for a retrial.

As we reported ... Lindsay Clancy's attorney -- Kevin Reddington -- asked Judge Sullivan for time so he could appeal the mistrial decision to the Massachusetts Supreme Judicial Court ... and the judge gave him an hour.