RICHMOND, Texas - The Fort Bend County Sheriff's Office is asking for the public's help finding a man who's been missing since Tuesday night. That father of four was selling his car online and went to meet someone who was interested.

“All I can say is he is good, and I don’t know what happened to him," Quratulain Malik said.

Emotionally drained and understandably shaken, Malik has so many questions.

“Right now, we don’t know anything about that, what happened to him. And I was praying that he would be at home," Malik said.

Yet, she has no answers.

“The kids need him. There is a family who is waiting for him," Malik said.

Her husband of 13 years and the father of their four small children, Altaf Malik, left Tuesday night, and hasn't been seen since.

“He told me that he received a text on the phone and somebody wanted to see the Audi," Quratulain Malik said.

That Audi Altaf Malik had posted for sale, a black, 2009 A-8 with a Texas tag HZX-9910, to several online websites.

Sample photo of the car a missing Richmond man was last seen driving.

Someone was interested, so he was to meet them nine miles away at an H-E-B gas station at Highway 6 and Bellaire Blvd.

But two hours later, he hadn’t come home.

“I texted him, but he didn’t respond. And I gave him a missed call too, and it was going to voicemail," Quratulain Malik said.

Investigators are now involved. They have since interviewed family, friends and coworkers. They agree something’s up.

“Right now at this point, we can not say that it was on his free will that he left or if it was foul play," Sgt. Dalia Simons said.

But she says online ads are a hotbed for criminals.

“Whenever people advertise that they’re selling something online, that’s a good place for thieves and scammers to meet their next victim," Simons said.

Quratulain Malik says their kids know something is wrong. Her 10-year-old daughter shared a picture she drew of her father.

"I don’t know what happened exactly, but the people, they can just take the car. Please don’t harm him, you can just, you know take that car, we don’t want the car. He is more important to us," Quratulain Malik said.

If you have any information about where Altaf Malik might be, you are asked to call Fort Bend County Crime Stoppers at (281)-342-TIPS.