The family of missing 20th Century Fox executive Gavin Smith has started a new site to help find investigators find him.

"Find Gavin Smith," which launched Monday, has a physical description of Smith, contact information in case he's spotted and a blog that posts new updates about the search. It also includes a forum for people to add investigatory updates on the case.

His son, USC basketball player Evan Christian Smith, has been tweeting about Smith's disappearance in order to "keep the story alive." According to his Twitter feed, authorities have "combed the canyons" looking for Smith and have received a lot of tips, but none of them have proved useful yet.

Evan last spoke to his father two weeks ago, reports E! News.

On Tuesday night when he disappeared, Smith was staying over with a family friend in Oak Park, Calif. His wife, Lisa Smith, told ABC News that the two had spoken earlier in the day to arrange for someone to pick up their son Wednesday. When Smith didn't show up to work or to pick up his son, his family knew that something was wrong, and filed a missing persons report.

Smith's family wouldn't say why he was sleeping over at a friend's house. Evan told ABC News that Smith was a "great father" who had no reason to leave his family.

Smith is a distribution executive for 20th Century Fox who has worked on films like "Avatar" and "Star Wars." In 1975, he played on UCLA's championship basketball team under legendary Coach John Wooden.

The Los Angeles County Sheriff's Department released a description of him as 6-foot-6, 210 lb. man with green eyes, gray hair with blond streaks and a goatee. Other physical markers include a 5-inch scar on his calf and a 4-inch scar on his wrist.

He was last seen in purple workout pants and black and gray shoes, driving off in his black Mercedes at around 10 p.m. last Tuesday. His car is a black 2000 Mercedes 420E with padded storage racks on the roof and tinted windows.

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  • May 1, 201: Gavin Smith Last Seen

    Gavin Smith was last seen at his home on the 500 block of Callwood Court in Oak Park, Calif. He left in his 2000 black Mercedes Benz wearing purple pant and black and grey shoes.

  • May 4, 2012: LASD Releases Missing Person Bulletin

    Four days after he was last seen, the Los Angeles Sheriff's Department released a missing person bulletin about Gavin Smith.

  • May 7, 2012: Smith's Family Launches Website

    <a href="http://www.huffingtonpost.com/2012/05/08/gavin-smith-missing-find-gavin-smith-site_n_1501195.html" target="_blank">Smith's family launched</a> the "<a href="http://findgavinsmith.com" target="_blank">Find Gavin Smith</a>" site to get the word out about his physical description, contact information and details about canvassing and search parties. It was last updated May 17, 2012.

  • May 9, 2012: Smith Sons Go Public

    Smith's three sons went to <a href="http://www.insideedition.com/headlines/4329-family-of-missing-hollywood-studio-exec-continues-search" target="_blank">Inside Edition</a> to urge Americans to help find their father. They also spoke about how they were skipping school to help with the search. Check out <a href="http://www.insideedition.com/headlines/4329-family-of-missing-hollywood-studio-exec-continues-search" target="_blank">Inside Edition</a> to learn more about the toll the search was taking on the family.

  • May 24, 2012: Unconfirmed Reports Of A Sighting

    NBC LA reported that locals at tourist destination Morro Bay spotted someone who looked like Gavin Smith at a restaurant. They also claimed he was with a tall female companion. Morro Bay is located on the central coast of California. To see video of interview with Morro Bay residents, <a href="http://www.nbclosangeles.com/news/local/Missing-Fox-Executive-Gavin-Smith-Morro-Bay-Taco-Temple-Sighting-LA-County-Sheriffs-153446535.html" target="_blank">check out NBC LA</a>.

  • June 5, 2012: $20,000 Reward Announced

    Gavin Smith's family offers a $20,000 reward for information that could help bring the missing husband and father home. Check out <a href="http://losangeles.cbslocal.com/2012/06/04/family-to-offer-20k-reward-for-information-leading-to-fox-executives-return/" target="_blank">CBS2/KCAL9 for video</a> of the story.

  • June 9, 2012: Detectives Search Creech Home

    Los Angeles sheriff's investigators search the home of convicted drug dealer John Creech. <a href="http://articles.latimes.com/2012/jun/10/local/la-me-0609-fox-executive-20120610" target="_blank">Cops left with a computer</a>, boxes and a black SUV, reports the Los Angeles Times. Creech lived in the home with with Chandrika Creech, and a lawyer confirmed to the Times that it was in fact the second time police had search the property. Check out <a href="http://losangeles.cbslocal.com/2012/06/21/e-missing-fox-executive-is-romantically-tied-to-married-woman-whose-house-was-searched/" target="_blank">CBS2/KCAL9</a> for footage of the search and comment from Smith's sister.

  • June 10, 2012: Smith Family Continues To Search

    Friends and family continued to search for Gavin Smith in Sylmar, Calif. Sunday because a tower in the area had received the last ping from his cellphone before he disappeared.

  • June 21, 2012: E! News Reports On Romantic Link

    <a href="http://www.eonline.com/news/325213/sources-missing-fox-exec-gavin-smith-had-affair-with-woman-whose-house-was-searched-by-police" target="_blank">E! News reports</a> that Gavin Smith was romantically linked with Chandrika Creech. The pair met in therapy in 2008 and started to have an affair, according to an anonymous source. John Creech reportedly learned of the affair and asked his wife to end it.

  • March 14, 2013: Missing Persons Case Becomes Homicide Investigation

    Police are calling Smith's case a homicide investigation after the discovery of his <a href="http://latimesblogs.latimes.com/lanow/2013/03/gavin-smith-car-found-homicide-case.html" target="_blank">Mercedes Benz in a storage facility</a> linked to John Creech, reports the Los Angeles Times. No body has been recovered.