Transit Officer Richard Donohue 'Critical But Stable' At Mt. Auburn Hospital

BOSTON (CBS) - Transit Officer Richard Donohue, Jr. is said to be critical but stable at Mt. Auburn Hospital.

Donohue was shot in the thigh, hitting his femoral artery, in a violent exchange between Tamerlan and Dzhokhar Tsarnaev Thursday night.

Tamerlan was killed in the exchange, his brother was captured alive after a manhunt Friday night. The brothers are suspects in the Boston Marathon bombings.

On Sunday, the hospital held a press conference in which they said Donohue remains in the surgical intensive care unit but doctors are "cautiously optimist." He is expected to walk again, doctors said.

Dr. David Miller said Sunday morning Donohue was able to wiggle his toes and squeeze his wife's hand for the first time.

Miller said Donohue suffered severe blood loss from the gunshot wound to the point his heart almost stopped.

"The care he received at the scene and in the emergency room was well-organized, rapid and outstanding," Miller said.

Donohue remains of a mechanical ventilator and heavily sedated, doctors said.

"I'm hopeful he'll be able to get off the ventilator," Miller said. "It's standard care for someone who had sustained a massive blood transfusion."

Donohue's brother Ed Donohue is a Winchester police officer. He credited his brother and other officers for their heroic actions.

"As a brother, a fellow officer and an American, I can't describe the pride I have for Dick and other emergency personnel and how they acted Thursday night," he said.