SAN DIEGO -- After being released from jail without charges being filed Friday, Robin Alarcon did not answer the door of his Rancho Penasquitos home Saturday, or respond to accusations he sent inappropriate text messages to a 14-year-old student at Del Norte High School in 4S Ranch. His neighbors, however, had no problem sharing what they knew about the 35-year-old soccer coach.

"They just looked like a normal couple," said one neighbor Saturday when describing Alarcon and the woman she believes is his wife.

A former soccer player who lives nearby said the accusations hit closer to home, "just knowing that scares me," she said. "Knowing that he is now out, you never know what he is going to do. He could go back and do it to the same girl or any other soccer player.”

Alarcon, an assistant freshman girls' soccer coach at the school, was arrested on campus Wednesday afternoon on suspicion of luring a minor for sexual purposes and sending "harmful matter" to a juvenile.

Alarcon didn't respond to questions as he ducked into a taxi with his shirt over his head after being released from jail Friday night.

Authorities will continue their investigation, according to Paul Levikow of the District Attorney's Office. Law enforcement officers from multiple agencies served a search warrant on his home Friday night.

Following his arrest, Alarcon, a "walk-on" coach's aide at the school near Rancho Bernardo, was "permanently released from all duties" with the Poway Unified School District, said district spokeswoman Sharon Raffer. The suspect previously held similar posts at other PUSD schools, she said.

San Diego police Lt. Rick O'Hanlon declined to disclose the alleged victim's age and would not provide details on the nature of the alleged illegal "sexting" to the girl, other than to say it was "very inappropriate."

"The victim was obviously taken aback by the messages," the sex-crimes lieutenant told reporters outside the Police Department's downtown headquarters Thursday.

The alleged victim's mother told 10News, "It blindsided her. It came out of the blue. She feels as bad as anybody. She talked to her teammates first. They told her to report it ... Still, she is all alone in this. She is the victim here. This can never be her fault.

"I was quite honestly flabbergasted to see the words on those texts and deeply distressed at those horrible things ... It consumed me for two solid days."

As for Alarcon's release, the alleged victim's mother said, "There will always be people with blind loyalties who might still support Alarcon."

Alarcon's arrest was the second in just over a month involving a one-time physical education instructor with the northern San Diego County school district.

On Dec. 4, former Westview High volunteer wrestling coach Ryan Paul Carnell was jailed on suspicion of molesting an underage female student.

Carnell, 28, had pleaded no contest to lewd behavior three months earlier for sending a picture of his genitals to a 16-year-old female student.