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Sullivan grew up in Longview, Texas, an east Texas town of 70,000 people.
He was an imaginative and social child early on in life, his curiosity eventually led him to the stage where he performed in one-act plays at Spring Hill High and proved to be a natural in front of live audiences.
Upon high school graduation in 1996.
He was offered a theater scholarship at Kilgore Junior College but instead, he accepted an academic scholarship to Baylor University and majored in business, graduating in 2000.
During college, he performed in plays, was a member of Delta Tau Delta fraternity, and played one year of football.
His talent for acting landed him roles in stage productions by the Baylor theater department.
Though never a formal student of acting, much of Sullivan's postgraduate years have been dedicated to small budget films working closely with friends on both sides of the camera.
David starred as "Abe" in the 2004 independent film Primer, which won the Grand Jury Prize at the 2004 Sundance Film Festival.
The movie was filmed in Dallas in 2001, but spent two years in editing and post-production.
Since the debut of Primer, Sullivan has moved to Los Angeles to pursue a career as an actor.
He has appeared in several television shows including Joey and Big Love, and filmed several movies.
Primer was Sullivan's first official casting call, and his first leading role in a feature film.
A couple seeks refuge in a remote mountain town to escape a mysterious viral disease that makes people disappear or turn into murderers. As messengers emerge from the forest, the couple must decide who to trust and what to do to survive.
After losing a custody battle, perpetual teenager Wayne Stobierski steals his son away for one last father-son weekend to the city of their dreams - Milwaukee, Wisconsin. What's supposed to be a light-hearted adventure soon transforms into a journey of profound redemption.
After the accidental death of her rapist, an art student becomes an unlikely vigilante, set out to avenge college girls whose rapists were not charged.
30 years ago, when members of a religious cult known as Heaven's Veil take their own lives. The truth behind what really happened remains buried deep in the memory of the sole survivor, a five-year-old girl. Now as an adult she returns to the compound with a documentary crew. They soon discover something that is far more terrifying than anything they could have imagined.
As the Iranian revolution reaches a boiling point, a CIA 'exfiltration' specialist concocts a risky plan to free six Americans who have found shelter at the home of the Canadian ambassador.
When they say “love is blind” they must have been talking about Amy and Ben. Amy is a beautiful young woman with a mysterious past. Ben is a scruffy slacker, whose only ambition seems to be avoiding growing up. However, Amy sees something in Ben that Ben doesn't see in himself, which gives Ben the confidence to make something of his life. The power of love shows Ben that being a grown-up isn't such a bad thing after all.
While still mourning the loss of her husband and daughter, recently widowed Ellie King visits her brother Aaron Davis and his children for Christmas. Ellie does her best to enjoy the holidays, even making new friends with Mrs. Thompson, a local shop keeper, and handsome admirer Deputy Strode. Settling in nicely with her brother's family, Ellie also meets Erik, a young man abandoned by his outlaw father whom Aaron has taken in as one of his own. When Aaron travels out of town to purchase adjacent land for farming, Ellie agrees to watch his children, but the season’s festivities are threatened when Aaron goes missing.
Follows a seasoned detective on the trail of a ruthless killer intent on slaughtering prostitutes along West Hollywood's Sunset Strip. It appears that the murderer's grisly methods are identical to that of London's infamous 19th century psychopath Jack the Ripper – a relentless serial killer who was never caught by police. To make matters worse, the detective soon notices the parallels between the crimes committed by the West Hollywood stalker and those of a serial murderer incarcerated years ago. Could the wrong man be behind bars?
Texan Charles Farmer left the Air Force as a young man to save the family ranch when his dad died. Like most American ranchers, he owes his bank. Unlike most, he's an astrophysicist with a rocket in his barn - one he's built and wants to take into space. It's his dream. The FBI puts him under surveillance when he tries to buy rocket fuel, and the FAA stalls him when he files a flight plan – but Charles is undeterred.
Two fledgling inventors discover a complex method to manipulate reality. At first, they successfully game the stock market with it, but the consequences of the invention start to catch up with them.