Evan Christian Smith is networking as only an Internet-savvy son with a desperate mission can — to find his father, missing film executive Gavin Smith, who disappeared one week ago seemingly without a trace. 

"plz Help find my Dad. 6'6 220 pounds. Muscular. blond/grey hair. Black mercedes with a surf rack," reads a recent Tweet by the younger Smith, who is a student at University of Southern California.  

The Twitter account and website dedicated to getting out the word and calling for tips have generated an outpouring of interest, support, prayers and retweets, but so far — like the investigation by the Los Angeles County Sheriff's Department — haven't turned up substantial leads in the case. 

Smith, 57, 6-foot-6, 210 pounds — a one-time basketball star at UCLA — was last seen leaving a friend's home in the residential LA suburb of Oak Park on the night of May 1, just a few miles from his home.

Colleagues became alarmed with Smith failed to show up at work. His wife reported him missing by 6 p.m. that evening, according to the San Jose Mercury News. 

His car, a black 2000 Mercedes 420E with padded storage racks on the roof and tinted windows, also remains missing.

The Sheriff's Department issued a missing persons alert on Saturday.

"We really don’t have a whole lot more," said Ray Leyva, a commander in the Sheriff’s Department. "We are still asking the public’s help to find the vehicle and or him."

Investigators are also keeping an eye on the social media posts, Leyva said.

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Smith has worked for 20th Century Fox's movie distribution department for nearly 18 years, according to the company, which put out a statement on his disappearance.

"We are extremely worried about our friend and colleague Gavin Smith and are actively doing what we can to assist the Los Angeles Sheriff's Department in their search for him," the company said.

Family members said the missing man apparently had not used his credit cards since his disappearance and they were unable to contact his cell phone, which seems to be off, Reuters reported.

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