In the months following Rudy Eugene's face-mauling attack on Ronald Poppo on Memorial Day weekend, the question remains: Why did he brutally attack a homeless man on a sunny Saturday afternoon?

Toxicology reports were unable to prove that an illicit substance was to blame for Eugene lashing into Poppo's face with his teeth -- an assault so unthinkably gruesome it sparked fear of a zombie apocalypse across the country.

And now another strange detail raises new questions about whether the attack was random at all.

In an extensive Miami Herald report, Eugene's friend Christian says the two had met Poppo before while volunteering with Miami's homeless community.

“Poppo seemed like a nice and kind man,” Christian told the Herald. “I remember when we gave him food.’’

Poppo, who has been called "extremely charming" by staff at Jackson Memorial Hospital where he continues to recover, was napping in the shade of the Metrorail when Eugene attacked him after crossing the MacArthur Causeway on foot.

The fact that police found torn-out pages from the Bible scattered along Eugene's path and near the site of the attack has prompted many in the local community to think that religion played a part in his bizarre behavior. Others blame Vodou based on Eugene's Haitian heritage.

Several Haitian churches refused to host Eugene's funeral after congregations said that they would be uncomfortable having his body in their place of worship. Read the full details at the Miami Herald.

HOW YOU CAN HELP: The Jackson Memorial Foundation has set up a fund to assist Ronald Poppo in his recovery, which experts in facial reconstruction have said will include lengthy treatment, staged reconstruction, and psychological care. Donations can be made online at jmf.org.

WARNING: SLIDESHOW CONTAINS GRAPHIC PHOTOS:

Loading Slideshow...
  • Rudy Eugene

    Rudy Eugene poses for a picture in this undated photo. Eugene was shot to death by Miami police as he crouched over Ronald Poppo's limp body, naked and growling, chewing off chunks of the man's face. (Miami Herald/MCT via Getty Images)

  • Rudy Eugene

    A photo of Rudy Eugene as happy young toddler. Eugene was shot to death by Miami police as he crouched over Ronald Poppo's limp body, naked and growling, chewing off chunks of the man's face. (Miami Herald/MCT via Getty Images)

  • Rudy Eugene

    A photo of Rudy Eugene as happy young toddler. Eugene was shot to death by Miami police as he crouched over Ronald Poppo's limp body, naked and growling, chewing off chunks of the man's face. (Miami Herald/MCT via Getty Images)

  • Rudy Eugene

    A photo of Rudy Eugene as happy young toddler. Eugene was shot to death by Miami police as he crouched over Ronald Poppo's limp body, naked and growling, chewing off chunks of the man's face. (Miami Herald/MCT via Getty Images)

  • Ronald Poppo At Stuyvestant High

    Ronald Poppo <a href="http://www.huffingtonpost.com/2012/05/30/ronald-poppo-face-eating-victim-miami-stuyvesant-high-school_n_1556692.html?utm_hp_ref=rudy-eugene" target="_hplink">attended New York City's prestigious Stuyvesant High School</a> before becoming homeless and lost to his family for decades.

  • In a <a href="http://www.huffingtonpost.com/2012/06/12/ronald-poppo-face-chewing_n_1590459.html" target="_hplink">photo released June 12</a>, Ronald Poppo walks with assistance at Jackson Memorial Hospital.

  • A photo <a href="http://www.huffingtonpost.com/2012/06/12/ronald-poppo-face-chewing_n_1590459.html" target="_hplink">released June 12 by Jackson Memorial Hospital</a> shows progress treating Ronald Poppo's horrific injuries.

  • A City of Miami police officer stands watch near the scene where a naked man, far right, was shot dead on the MacArthur Causeway ramp onto Northeast 13th Street in Miami on Saturday, May 26, 2012. A witness said the naked man continued to chew on the face of another naked man on a Miami highway ramp and growled when a police officer tried to stop him. The victim remained hospitalized Monday. (AP Photo/The Miami Herald, Marsha Halper) MAGS OUT

  • Crime Scene investigator Andres Betancourt photographs a credit card found at the scene belonging to Rudy Eugene, Tuesday, May 29, 2012 in Miami. Authorities were seeking more witnesses Tuesday to help explain what led Eugene, who was naked, to start chewing another naked man's face and whose only response when confronted by police was to growl and keep attacking - even after being shot by police Saturday. (AP Photo/Wilfredo Lee)

  • First responders treat Ronald Poppo after the attack.

  • This 2008 video shows Rudy Eugene in Miami-Dade bond court on charges of marijuana possession and marijuana possession with intent to distribute.

  • Rudy Eugene, undated photo

  • Ronald Poppo

  • Westbound traffic on the MacArthur Causeway, approaching the Northeast 13th Street ramp in Miami, is backed up Saturday May 26, 2012, after a police officer fatally shot a naked man on the ramp who was chewing on the face of another naked man. The victim remained hospitalized Monday. (AP Photo/The Miami Herald, Marsha Halper) MAGS OUT

  • Scene of attack

  • Rudy Eugene's Longtime Girlfriend

    Rikkia Cross cries as she talks about her relationship with Rudy Eugene.

  • Girlfriend Says Face-Chewing Attacker Was Religious

    A South Florida woman says she often read religious texts with a man who is accused of chewing off the face of a homeless man. Rudy Eugene was shot and killed by police. (June 6)

  • Gloria Allred, Yovonka Bryant

    Yovanka Bryant,left, and her lawyer, Gloria Allred, discuss a recent attack on a homeless man by Brant's boyfriend Rudy Eugene, during a news conference, Wednesday, June 6, 2012 in Miami. Bryant said she last heard from Eugene, the day before he chewed off the face of a homeless man alongside a Miami highway. A police officer shot and killed Eugene. The homeless man remains hospitalized. (AP Photo/J Pat Carter)

  • Gloria Allred, Yovonka Bryant

    Yovanka Bryant, right, and her lawyer, Gloria Allred, show a photo of Bryant and her boyfriend Rudy Eugene, during a news conference, Wednesday, June 6, 2012 in Miami. Bryant said she last heard from Eugene the day before he chewed off the face of a homeless man alongside a Miami highway. A police officer shot and killed Eugene. The homeless man remains hospitalized. (AP Photo/J Pat Carter)

  • Full 18-Minute Attack Surveillance Footage

  • Photos Released of Face-Chewing Victim in Miami

    Doctors release photos of Ronald Poppo, the 65-year-old homeless man who was the victim of a gruesome face-eating attack in Miami.

  • Miami Homeless Discuss Face-Eating Attack

    Homeless men who live near where one man allegedly ate the face of a homeless man react to the crime. (May 30)

Earlier on HuffPost: