CLEVELAND, Ohio -- A Rocky River father charged with killing his adult daughter was caught on surveillance video loading a revolver inside his gas station the day before the killing, according to court records.

The video pulled from the Chardon gas station owned by Jamal Mansour is evidence that Mansour had a "calculated plan" to use the gun a day before he shot his 27-year-old daughter Tahani Mansour, Cuyahoga County prosecutors said in court documents.

Mansour, 64, is charged with aggravated murder, murder and felonious assault in the Sept. 27 killing inside Mansour's Vine Court home. He has pleaded not guilty.

Mansour shot his daughter three times in the head, including one shot that was fired from less than a foot away, prosecutors wrote in court records. Police found the woman in her bed.

Rocky River Prosecutor Michael O'Shea called the killing "an execution" at Mansour's Sept. 29 arraignment.

Police recovered three bullet casings from Tahani Mansour's bedroom and a revolver.

Investigators have not released a motive for the killing, but court records say Mansour said on scene that he shot his daughter "out of anger."

Police obtained surveillance video in October that showed Mansour taking a revolver out of a safe in his gas station and loading it on Sept. 26, the day before the shooting, court records show.

Police said that an investigation revealed that Mansour rarely took the gun home.

Prosecutors did not say in the court filing that the revolver shown on the gas station video was the same one used in the killing.

Tahani Mansour was a clinical instructor at the University of Findlay, and until September worked as a pharmacist at University Hospitals Ahuja Medical Center.

Her father came to the United States from Jordan in 1978, and became a U.S. citizen in 1982, defense attorney Justin Withrow said at a previous arraignment hearing.

Jamal Mansour and other members of his family own several stores across Northeast Ohio, lawyers said.

To comment on this story, please visit the cleveland.com crime and courts comments section.