ORLANDO, Fla. -

The brother of the married couple allegedly held hostage by cop-killer Christopher Dorner broke his silence Thursday, speaking exclusively with Local 6.

The nation was glued to television sets Tuesday as the terrifying moments unfolded in front of their eyes. But for Roy Reynolds, it hit home when he realized his brother Jim and sister-in-law Karen were at the center of it all.

Reynolds said he spoke with Jim Wednesday evening about the traumatizing ordeal.

"He said there was a silencer on the gun, so even though the police were right across the street, he knew if they fired the gun, police would never hear it," said Roy.

The pair were held hostage in one of their cabins at the Mountain Vista Resort in Southern California after they walked in on an armed Christopher Dorner at the top of the stairs.

Jim and Karen Reynolds described what happened in a press conference Wednesday.

They said Dorner tied them up, gagged them, and covered their heads with pillowcases. Then he bound them with an extension cord. After Dorner left the cabin in their car, the couple was able to call 911 using voice control on their phone, which had been dropped nearby.

Roy said he didn't know it was his brother who was being held captive until he received an email with a header saying "Kim et al ok" Wednesday morning.

By that evening the details were becoming clearer. He received another email from his brother's wife giving a detailed account of what happened.

"He took them on the couch, tied their hands and said, 'Lets move to the back room,'" said Roy. "My brother said that's when he started to really be scared and thought, 'This could be it.'"

Roy described his sibling as a private man and a Vietnam veteran who is still processing the encounter.

"For him to know his wife was in danger, that was even more terrifying and he would want to protect her," said Roy.

Roy said knowing his brother was so close to being Dorner's fifth victim has left him feeling thankful.

"I've thought about the last day, about how my life would be different if he wasn't here and how much I love my brother," said Roy.

He said the couple has been working to sell the seven cabins they own for more than a year, hoping they can soon retire and leave Southern California.