The Profile
From my research, I can conclude that Richard Chase is a disorganized serial killer. All of his murders were unplanned and not targeted, as he simply went into any house with an unlocked door. He left all the bodies at the scene except for David's, which he took with him. Almost all the victims were mutilated extensively and sexual acts were only performed post-mortem. He came from an unstable family and had a history of sexual disorders, including erectile dysfunction. He lived in an apartment alone and all the crimes were committed within it's proximity. He was not careful about what forensic evidence he left behind (semen, handprints, and shoeprints).
I categorized Richard Chase as a lust killer, due to the sexual gratification he achieved from the act of murder. Since he was young, he was unable to achieve erections due to his erectile disfunction. However at the crime scene of Evelyn Miroth, medical examiners reported finding an abnormal amount of semen in the corpse's rectum, indicating an unusual amount of ejaculations. Chase was also driven by his lust for blood, believing that the blood of others would keep his heart from stopping, and in turn, give him more erections.