Security guard accused of killing wife and step-son in west Harris Co.

HOUSTON (KTRK) -- His voice cracking with emotion, Dong An searches for the right words for his broken heart.

"It hurts, I'm devastated," says the father of Bang "Michael" An.

An was killed alongside his mother Zhi Liu in the garage of their west Harris County Home.

Harris County Sheriff's Office on Wednesday named Peide "Peter" Yang as the suspect in the murders. Yang is the current husband of Liu, and step-father to Michael An. Detectives currently do not know where he may be.

"All I know is they died here," says the elder An.

He traveled all the way from China looking for answers as to why his son and ex-wife were murdered. An says he became worried in late August, when he couldn't reach his son Michael and his ex-wife. A welfare check from a Houston friend led to the gruesome discovery of their bodies in the family garage. Now, there is a makeshift shrine in the garage honoring the two who died.

As for Yang, he worked for years as a security guard with the company Asian American Security. For the past several years, he was stationed at the American First National Bank on Blalock Road. Co-workers last saw him on the Friday before Labor Day weekend.

"He asked permission from us (for vacation,)" says Alberto Grau, Yang's supervisor. "He said to bring his mom to the doctor. That's it."

Grau says Yang never officially quit, they just never saw him again. Like all security guards working for the company, Yang received gun training and carried a weapon. It is unclear if he ever returned his gun to the security company. Sources in the bank tell Eyewitness News that Yang was shown on security video as leaving his job that late August morning, never to be seen again.

Investigators have not speculated on a motive, though family members tell Eyewitness News the couple have argued about gambling issues in the past.

An and his relatives say they are now trying to navigate the U.S. legal system and making burial arrangements with the help of the local Chinese Consulate. He says Michael An, who once studied music, wanted to join the Houston Police Academy after he finished school.

"My purpose now is to take my son's and his mother's bodies back home," he said.