The tracks of Aaron Hernandez’s cell door were stuffed with cardboard to prevent it from opening and the prison floor was covered in shampoo to make it slippery when prison officers arrived after being informed the former NFL player was hanged in the cell, Massachusetts State Police wrote in an investigative report Thursday.

The report said Hernandez was found hanging naked April 19 from a bed sheet tied around window bars at the Souza-Baranowski prison, Massachusetts. He was serving a life sentence for the 2013 murder of semi-professional football player Odin L. Lloyd.

Read: Aaron Hernandez ’s Final Letter Was For Attorney Jose Baez, Report Says

Hernandez’s right middle finger had a fresh cut and blood was seen on adjacent fingers, the report said. His forehead had "John 3:16" written on it with ink and large circular blood mark was seen on each of his feet, the state police added in the report.

The Bible passage John 3:16 states: “For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.”

Prison officers also found several drawings and “John 3:16” written on the cell walls in a substance consistent with blood. A Bible was open to John 3:16, which was marked with blood and was placed under the drawings

Officers also found three handwritten notes next to the bible. The contents of the notes were not added in the report.

State police said the postmortem toxicology report showed no drugs were present in Hernandez’s system. Autopsy results showed that he died of asphyxia by hanging and his death was ruled as a suicide.

Correction officers informed police Hernandez was locked in his cell just before 8 p.m. EDT on April 18 and one officer said he last saw the 27-year-old around 1 a.m. EDT on April 19.

A review of video surveillance showed Hernandez on the phone before being locked in his cell. After listening to his last five phone calls, officials said he did not indicate “intent to harm himself during any of the phone calls.”

Last week, a report by Boston TV station WCVB said Hernandez drew "odd symbols" on the prison wall with his blood before ending his life. The former New England Patriots tight end wrote "Illuminati" on the wall and drew an unfinished pyramid and the all-seeing eye of God, WCVB reported.

On Wednesday, a Boston Herald report said the analysis of Hernandez’s brain, blood and urine samples would not be released to Llyod’s mother’s lawyers for the wrongful death lawsuit against Hernandez’s estate.

New Bedford Superior Court Judge Thomas F. McGuire Jr. rejected requests of saving Hernandez's tissue and fluid samples to carry out neuropathology and toxicology analysis. Prosecutors had earlier said the materials were “critical and irreplaceable evidence” of the cause of Hernandez’s death.

McGuire’s ruling said the analysis of Hernandez's physical remains do “not establish a factual basis for the assertion that Mr. Hernandez’s physical condition at the time of his death is relevant to the issues raised in this civil action.”