Ex-Buffalo Bills star Richie Incognito allegedly wanted to cut off his dead dad's head, according to a police report.

The former NFL offensive lineman posted a $20,000 bond Tuesday after being arrested in Scottsdale, Arizona, on suspicion of misdemeanor charges of threats and disorderly conduct. Incognito, 35, was accused of threatening to shoot employees of a funeral home a day earlier.

The Associated Press reports Incognito was at the Messinger Pinnacle Peak Mortuary on Monday to make arrangements for his father, who died last weekend.

"Incognito reportedly was upset with staff and began to damage property inside the business and shout at employees," said Sgt. Ben Hoster, a police spokesman. "At several points during his contact with staff, Incognito threatened to retrieve guns from his vehicle and return to shoot the employees."

A police report showed officers later executed a search warrant on Incognito's pickup truck and seized two Glocks, three rifles and a silencer for a handgun.

Witnesses told police that Incognito was acting erratically, asking for his father's head to be cut off "for research purchases." When the mortuary refused, Incognito allegedly punched caskets, threw pamphlets around and slammed an urn on top of a casket.

TMZ reports one staffer "thought Incognito was going to kill him" and ran to a secure room while waiting for police to arrive. Cops arrested Incognito, who "appeared to lack concentration and was unable to maintain a coherent thought," at gunpoint.

The police report said Incognito was also upset when family told him he wasn't going to be allowed to attend his father's funeral due to his behavior.

Incognito grew up in Arizona, playing high school football near Phoenix before attending the University of Nebraska. He spent 11 years in the NFL with the St. Louis Rams, Miami Dolphins and Buffalo Bills.

Incognito was suspended by the Dolphins in 2013 for bullying a teammate and arrested last May in Florida for allegedly throwing a dumbbell and tennis ball at another gym patron.

Incognito retired this past offseason due to concerns over the health of his liver and kidneys.