Drained

A mad scientist researching human immortality buries his family after a horrible accident.
He returns to work the next day.
His coworkers think he distracts himself with work to cope with his loss. In reality he is obsessed. He wants to halt aging. Cure all diseases. Fix the errors in the human genome. Regrow lost limbs. Regenerate sick or missing brain tissue. Unfortunately, the science he must use is both immoral and illegal.
His best friend runs the biotech company for whom they both work. Seeing dollar signs, he funnels money into a secret lab in the desert in New Mexico on the Navajo reservation, far away from prying US Government eyes. In their hubris they install cameras to record all of their experiments because they truly believe they will go down in history as the greatest scientists the world has ever known.
Their experiments continue to fail.
Eventually he tries one last resort. He takes a frozen fertilized egg, operates upon it, exposes it to radiation and finds success. He grows the fetus in his lab and experiments on it.
His heart changes, however. Perhaps he misses his family or maybe it is because the experiment looks like a child. In either case, he treats it as his son.
As the child grows, the scientist becomes aware of his success. He heals at a phenomenal rate, does not age, and is a genius. The downsides? He cannot communicate verbally. He has no immune system and he is a giant. He will never be able to leave the lab because of his appearance and his reliance on regular interferon injections.
Around his twenty-first birthday, the specific type of interferon he requires to live is discontinued by the manufacturer. His supply dwindles as they try but fail to replicate it in the lab. Their only resort? Harvesting the compound from fresh human blood. In a fit of contrition, the mad scientist makes the ultimate sacrifice and hooks himself up to a machine which drains all of his blood, refines it, and gives his son a week’s worth of serum.
Before his death the scientist also set up a deal with the local Tribe. In exchange for the Experiment “harvesting” murderers, child molesters and other violent offenders for their blood, the Tribe will keep his secret and protect him from the outside world.
One day while harvesting, he spots a van load of young students. One in particular catches his eye. Lonely, he falls for her from a distance.
Imagine his surprise when their van breaks down in the desert and he is forced to make a choice. Let them die of dehydration or rescue them. He takes a chance and saves them.
They enjoy each other’s company. He feels like he finally has friends. But one in the group is a troublemaker and decides to snoop. He finds the video feed and watches it. He sees their host exsanguinate people and think he is a serial killer.
With help from another student, they ambush him in his sleep and try to kill him. He swats them off, and gathers them together to tell them his story.
They accept it, but the troublemaker turns out to be a murderer himself who wants to kill the monster and take his place.
After the gamble he took exposing himself and the kindness he showed, he comes to realize that he isn’t the monster.