The man suspected of shooting his estranged wife as she sang at a Cheyenne restaurant may have taken his sniper shot as far as 100 yards from the woman, police told FOX News Monday.

"We're still looking at the ballistics, at the trajectory," Cheyenne Police Capt. Jeff Schulz told FOX News. "We've got two likely positions. One is right outside, in the parking lot area; we've got another area approximately 100 yards away he could have shot from."

Police were focusing their search on the woods surrounding Cheyenne. Schulz said people who knew David Munis, 36, told police that Munis was a "big hunter" and an avid outdoorsman.

"We really don't have anything specific to where he could be," Schulz told FOXNews.com.

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A black pickup truck matching Munis' 1999 Dodge Ram was seen leaving the Old Chicago restaurant moments after the sniper-style shooting of the singer through a glass door on Saturday night. Police planned to release a picture of the truck on Monday.

That Munis may have been headed for any one of the region's vast national forests wasn't especially helpful information, however. "The woods, obviously, is a pretty big area when you're talking about Wyoming, Montana," Schulz said.

He said he doubted, but hadn't ruled out, that Munis was still in Cheyenne.

Robin Munis, 40, was shot while singing in a band shortly after midnight Saturday. Police suspect that the bullet came from the parking lot behind the restaurant. They found the bullet lodged in a door frame.

Investigators were looking into Robin Munis' MySpace page as well.

Schulz said police had talked with David Munis just hours before the shooting.

The Munises had been separated for a few weeks and Robin Munis had moved out of their home. On Friday, she called police after getting several harassing but non-threatening phone calls from her estranged husband, according to Schulz.

While an officer was at her home, David Munis called again.

"The officer picked up the phone in place of Mrs. Munis and just explained to him, 'Hey — Can't do this,"' Schulz said. "He was very agreeable."

But within hours, Robin Munis, a singer in a classic rock-and-country band called Ty and the Twisters, lay dead on the stage at Old Chicago.

On Sunday, business at the restaurant was sparse. The shattered glass door had been covered with plywood and a pool table was back in its spot at the occasional stage area.

A narrow piece of the wall next to a steel emergency exit door had been removed; Schulz said the bullet removed from the door frame would be analyzed.

"We basically destroyed the door to get it out of there," he said.

Besides being a hunter, David Munis had received sharpshooter training while in the active U.S. Army. He has been in a Wyoming National Guard member since 2003.

Schulz said police were questioning David Munis' relatives in Montana and a friend at an Army base in Kentucky. Munis had been in touch with the friend over the past couple months.

"Basically wherever his family is, old friends, things like that, that's what we're looking for," Schulz said.

He said Munis had no criminal record except for a speeding ticket a few years ago. Schulz said he knew less about Munis' regular Army record, but pointed out that Munis was about to be promoted to second lieutenant in the National Guard.

"From all accounts, we've got a guy who had never been in trouble, was successful in the military," he said.

But a search of the couple's home on Saturday, he said, turned up more evidence tying Munis to the shooting. He didn't elaborate, but said that police seized several guns.

Police believe that Munis owned more than 10 rifles. The gun used in the shooting had not been found.

Jim McBride, a partner in the Old Chicago location, said he was allowing his staff to return to work whenever they felt comfortable.

"We've got a couple kids who can't even walk into the building yet," he said.

He said grief counseling had been set up for the restaurant's employees.

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The Associated Press contributed to this report.