A Pasadena man has been charged with murder, manslaughter and drug charges after police said his initial story of shooting a person in self-defense did not match the evidence.

Anne Arundel County police announced charges Thursday in the killing of Jeffrey Dickinson, 44, whom they alleged was shot and killed by Pasadena resident Gregory Korwek the morning of Sept. 18.

Initially, Korwek called police and said Dickinson threatened to burn down his house and was traveling there on a gas-powered scooter. An officer arrived at the house within six minutes, police said, at which point Korwek ran out saying ‘Help me, help me, I shot him.’”

An investigation into the incident revealed that Dickinson made no threats when he traveled to Korwek’s house that morning in an attempt to collect money Korwek owed him, police said. Dickinson told Korwek in a text message that he was unarmed and not threatening violence.

Korwek told Dickinson he was not welcome and fatally shot him in his driveway after he arrived, police said. No evidence of an altercation was found.

Korwek has been charged with second-degree murder, manslaughter, use of a firearm in a violent crime, six counts of possession of a controlled dangerous substance that is not marijuana, possession of a shotgun/rifle while being disqualified and possession of a shotgun/rifle with a felony conviction. He turned himself in Thursday and is being held without bond.

Detectives searched Korwek’s residence and found six handguns, three shotguns and five rifles — including assault rifles. He was legally disqualified from possessing any firearms because he pleaded guilty in 2005 to first-degree burglary. Police charged Korwek with illegally possessing firearms shortly after the shooting, but those charges were later dropped.

Police said they also found cocaine, morphine, suboxone and marijuana at Korwek’s house.

Korwek and Dickinson worked together, police said. Korwek’s attorney said in September that Dickinson worked for a friend of Korwek’s and was fired. After losing his job, Dickinson threatened both the friend and Korwek and was en route to Korwek’s house to hurt him, his attorney said.

Police learned through witness interviews that Dickinson came to Korwek’s house that morning because he was owed money.

A bail review for Korwek has been set for 10:30 a.m. Friday at the Glen Burnie District Courthouse.

The investigation is ongoing. Police are asking anyone with information to contact the homicide unit at 410-222-4731 or the Anne Arundel County Police Tip Line at 410-222-4700.