Brian Terrett, center, public relations director for Legacy Health System, speaks with Oregon State... 
(AP)
An Oregon woman had filed for divorce just a week before her estranged husband opened fire at the suburban Portland office park where she worked, fatally shooting her and injuring two of her co-workers before killing himself.
Teresa Beiser, 36, was asking for joint custody of her two children with Robert Beiser, 39, in what appeared from court documents to be an amicable dissolution of their marriage.
But a martial arts instructor who knew the Gladstone couple well said Robert Beiser bought firearms recently and wanted to go to a shooting range to practice.
"He never had guns, and all of he sudden he buys guns," said Al Dorsey, who has taught the couple's 14-year-old daughter tae kwan do for several years.
Dorsey said many parents and students at the TaeKwanDo 2 martial arts training hall, based in suburban Milwaukie, Ore., are considered friends. He knew the Beisers well and watched the childhood sweethearts struggle with their marriage before their divorce petition was filed last week in Clackamas County Circuit Court.
"Rob came in all the time and talked to me, and Teresa would talk to me or my wife," Dorsey said.
But when Robert Beiser recently showed an interest in guns and wanted to go to a shooting range, Dorsey — an Army veteran — was wary.
"I told my wife, 'I don't feel comfortable going shooting with anybody that's going through a divorce,'" he said.
Wednesday evening, the Tualatin Police Department released more details about the shooting at the medical lab where Teresa Beiser worked. Police said Robert Beiser got out of his vehicle shortly before noon Tuesday and began firing into the front windows of the Legacy MetroLab. He was armed with a rifle, a shotgun and a handgun.
He fired at least three rounds into the building from the parking lot. One of those rounds struck Teresa Beiser as she was standing near the front lobby.
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