"Randall, turn the window down, turn up the music. Take me to meet your father." ― William Hill
William Hill was the biological father of Randall Pearson. He abandoned Randall at a fire station soon after his birth. He was also bisexual. He had Stage 4 stomach cancer and passed away from it.
William grew up in Memphis with his parents. His father died in the war. His mother, a widow, raised him alone. Early on in his life he showed a talent for music and writing, and eventually joined a band alongside his cousin.
His mother moved to Pittsburgh in order to make more money, but became ill with cancer. William moved to Pittsburgh in order to help his mother and that's where he met Randall's biological mother, Laurel Dubois.
After William's mother passes away, Laurel gets him into the drug world and he becomes addicted to heroin. Laurel over doses the day after she gives birth. William believes her to have passed away after the paramedics pronounce her dead, which is why William drops the baby off at the fire station.
As the years go on, William remains a drug addict, until one night where he sees a monkey in the street at night and decides to join Narcotics Anonymous. Here he meets a man named Jessie and they end up falling in love. At some point in their relationship, William disconnects from Jessie.
In 2016, William reunites with his biological son, when the latter shows up at William's door. They are able to create a relationship before William passes away from stomach cancer.
William moved to Pittsburgh in order to help his mother and that's where he met Randall's biological mother, Laurel.
The two of them had a romantic relationship.
After William's mother passes away, Laurel gets him into the drug world and he becomes addicted to heroin. Laurel over doses the day after giving birth (William believed she died), which is why William drops him off at the fire station.
Notes and Trivia
"I told you I'd send you a postcard. Goodbye my dearest Beth, the daughter I never had. Love, William." William Hill (What Now?)