Betty Rodriguez, right, comforts her granddaughter Giselle during a prayer service held to honor the shooting victims at North Park Elementary School, Monday, April 10, 2017, in San Bernardino, Calif. A man walked into his estranged wife's elementary school classroom in San Bernardino and opened fire on Monday. (AP Photo/Jae C. Hong)
Betty Rodriguez, right, comforts her granddaughter Giselle during a prayer service held to honor the shooting victims at North Park Elementary School, Monday, April 10, 2017, in San Bernardino, Calif. A man walked into his estranged wife's elementary school classroom in San Bernardino and opened fire on Monday. (AP Photo/Jae C. Hong) Credit: Jae C. Hong

San Bernardino, Calif. — A gunman who shot and killed his estranged wife, a student and himself at a San Bernardino elementary school on Monday had made threats against the woman before but she didn’t take them seriously, according to police.

San Bernardino Police Chief Jarrod Burguan said at a news conference on Tuesday that special education instructor Karen Smith had been concerned about her husband Cedric Anderson’s behavior just prior to the shooting at North Park Elementary School.

Smith and Anderson had been married for just two months when she moved out of her house in Riverside, spurred by his accusations that she had been unfaithful to him, Burguan said.

Smith, 53, spent the next month staying with her adult children in Moreno Valley and Riverside, as Anderson contacted her repeatedly trying to persuade her to come home, Burguan said.

“She had mentioned that his behavior was odd and that she was concerned about his behavior and that he had made some threats towards her,” the chief said.

Anderson had threatened his wife multiple times but did not specifically say he would shoot her, Burguan said.

Smith resisted moving back in with Anderson, but “didn’t necessarily take those threats serious,” Burguan said. “She thought he was reaching out for attention.”