On the witness stand in the trial of the accused killer of Adam Anhang, homicide investigator Jose Miranda Diaz said Anhang's wife, Aurea Vazquez Rijos, failed to show up twice for police questioning in the days after his murder. Her relatives were also uncooperative, he said.

"I thought to myself, 'Why do these people not want to cooperate when they're supposed to be the first ones to cooperate?'" Miranda said during questioning by the prosecution.

Anhang, a 32-year-old Winnipeg native, was killed on the night of Sept. 23, 2005, as he and Vazquez walked in San Juan's colonial district. Vazquez, who authorities say is now in Italy, was treated for head injuries she sustained in the attack.

Miranda also said Vazquez told police Anhang's assailant had tattoos along both arms, conflicting with other witnesses' reports that the attacker wore a long-sleeved sweater.

The defendant in the murder trial is Jonathan Roman Rivera -- a dishwasher who worked in the San Juan restaurant that Anhang bought for his wife.

Vazquez sued Anhang's parents almost six months after the killing, asking for half of Anhang's assets and earnings acquired during their marriage.

Anhang, who moved to Puerto Rico in 2004, was a real estate investor in several hotel projects in the U.S. Caribbean territory and chief executive officer of an Internet gambling software company.