Anthony J. Standifer, who was convicted of the murder of a retired Independence Police Department employee in 2010, wants his life sentence set aside.

According to the Independence Police Department, Standifer, 28, has filed a motion to have his sentence revoked. He was supposed to appear before Judge Jack Grate on Friday, but he couldn't attend. The department said in a Twitter post Friday that officials at the Crossroads Correctional Center in Cameron, Mo., said were never notified to transfer Standifer to Jackson County for the hearing.

A tweet by IPD said “they can’t have the hearing without him being here, so they will have to reschedule.”

Standifer was convicted in May 2011 of second-degree murder, two counts of armed criminal action and first-degree robbery in the death and home invasion of Beverly Crowl. He received two consecutive life sentences in July 2011.

Standifer and three others smashed the front door and entered Crowl’s home in the 14600 block of East 37th Street in Independence on March 19, 2010. Police said the group intended to rob a drug dealer of marijuana and money, but they went to the wrong house. The 69-year-old Crowl was home alone at the time. She had worked for the Independence Police Department for more than 30 years before retiring in 2008.

Court records say Standifer and his party saw Crowl holding a phone. They searched the house and after finding nothing, took her purse. Standifer shot Crowl in the head because she saw their faces, according to court records.