Henry Grace

"Imagine what the world would have missed if da Vinci never showed his work."

Henry Grace is a serial killer who posed as a college professor in the Season Four episode "Masterpiece".

Background
A narcissist and prodigy, Henry's life fell into shambles when his brother William, a serial killer, was caught by David Rossi. Essentially becoming a pariah due to his relationship with William, Henry's beloved fiancée wound up leaving him, sending her ring to him in the mail as she was too scared to meet him face to face. Over time, Henry became overwhelmed by thoughts (consisting of the Fibonacci sequence 1 1 2 3 5 8 13 and phi) he was unable to banish and came to believe he was becoming like William, as they shared the same genetics; inspired by a quote he found in one of Rossi's books ("Vengeance keeps us sane") William began planning his revenge on Rossi, whom he blamed for ruining his life. Over five years, Henry worked on his plan, creating a vast underground chamber in his yard in Chester, Virginia, where he brought women he abducted (who fit the golden ratio) and killed them.

Masterpiece
Henry is met by the BAU team at Stayer University in Fredericksburg, VA. He is the only person in the lecture hall to have understood Reid's joke about existentialists. Outside campus, Henry confronts Reid and Rossi, showing them photographs of seven missing women he claimed to have killed. He explains that there are five others, a woman and four children, currently missing and that the BAU will have to find them. He appears to assist them in their investigation; his underlying motive, however, is to exact revenge on Rossi, who he views as responsible for destroying his family. While in custody, he is undaunted by Morgan's intimidation tactics. He does, however, appear to be nervous around Prentiss. The team theorizes that they can break him by finding out the names of his original seven victims.

Having no luck, Rossi interviews him. Henry tries to leave, but is blocked by Prentiss, who appears to intimidate him. Henry explains "the rules" to him, stating that one of the captives would die every two hours. Each time, a life-saving apparatus would be denied to one person (for example, every victim but one would receive an oxygen mask as poison gas is pumped into their prison.) In the meeting room, the team analyzes the locations of the previous victims, and Reid discovers a pattern that could lead the team to the five captives. The pattern 11235 (The Golden Ratio, perfect examples of beauty) is repeated throughout the scenes of the murders. By figuring out the pattern, the team can locate the five missing people.

As the team closes in, Henry states that they will not make it out of the house alive. He knew that Rossi would send the team to find the missing people, and that Rossi would stay behind. This would be Henry's revenge for his brother, whom Rossi had called "The Face of Pure Evil". His plan was foiled though, as Rossi outwitted him; the team had rescued the missing victims, and had not walked into Henry's trap. Rossi feigned despair during the interview, leading Henry to believe that his plan was successful. Before Rossi revealed the truth, Henry confessed to the original murders. Unbeknownst to him, however, Garcia was on the other side of the one-way glass recording the entire conversation. Enraged at being outsmarted, Henry attempts to attack Rossi as he turns to leave the interview room. Rossi overpowers him and asks "Is that how you do it? You wait till they turn their back?" He goes on to state that at Henry's execution, "just before they hit the plunger, I'm going to lean in real close and tell you to say hello to your scumbag brother."

Profile
Henry is an extreme narcissist, bordering on having a God complex, and a psychopath who craves attention. He is highly intelligent and was able to manipulate the system to gain professional credentials. He was also born with an extra Y chromosome and believes the old theory that the extra chromosome makes him a killer. This theory was debunked a decade ago, yet Henry still believes it. Rossi explains the reality to Grace, and tells him the double-Y theories are just "junk science". Henry showed signs of obsessive compulsive disorder, his fixation on the Fibonacci sequence causing him to unintentionally repeat the sequence in hand gestures and the like. Henry believes that humanity is, itself, narcissistic; as we are called Homo sapiens sapiens: Man, twice wise. He believes we should be eradicated.

As stated before, Henry is a narcissist who believes he is intellectually superior to everyone else. His killings are a means by which he taunts and challenges the authorities. He gets the BAU involved because he believes the case will prove too much of a challenge for Rossi to solve; thus proving that he is "better" and justifying his actions (to him). It is his way of forcing Rossi to pay for killing his brother William Grace years earlier.

Modus Operandi
Henry would watch his victims, all brunette women whom he saw as "perfect humans" due to their appearance matching the golden ratio, for some time, so as to pinpoint the perfect time to abduct them, which he did via sneak attack due to his general discomfort around women and to being, as Rossi put it, a complete coward; the victims were presumably kept in the same underground chamber as Kaylee Robinson and the abducted children. Henry would take photos of his victims before killing them (they were altered to obscure their features) and disposed of the bodies with hydrofluoric acid, which completely dissolves most organic compounds. Exactly how Henry killed his victims is never specified.

Real-Life Comparisons
Henry Grace appears to have been based on John George Haigh, also known as "The Acid Bath Murderer", a British serial killer active during the 1940s who killed at least six people and disposed of their bodies using sulfuric acid. Like Haigh, Henry was obsessively clean and planned to get away with murders on the grounds that no bodies had been located, but failed. Also, the way Henry placed Kaylee Robinson and the children inside a gas chamber bears some similarity to the way American serial killer H. H. Holmes killed some of his victims by placing them inside rooms fitted with gas lines, suffocating them to death.

Known Victims

 * Ann Ender
 * Grace Oldman
 * Heather Roundtree
 * Marcie Cole
 * Nancy Tremont
 * Margaret Peters
 * Lisa McDaniels
 * Abducted one woman and four children; all were rescued; whether or not he intended to kill them is unknown. They are:
 * Kaylee Robinson
 * Kaylee's daughter Chelsea
 * Jessica
 * Samantha
 * Ricky
 * Attempted to kill the following:
 * Aaron Hotchner
 * Spencer Reid
 * Derek Morgan
 * Emily Prentiss
 * Jordan Todd
 * Several unnamed policemen
 * David Rossi

Appearances

 * Season Four
 * "Masterpiece"