Authorities say a man wanted in the Monday-night shooting of a Birmingham mother of six is extremely dangerous, and also a possible suspect in a previous homicide.

Birmingham police late Tuesday afternoon announced Adam Isom is wanted on charges of capital murder, attempted murder and discharging a firearm into an occupied building. Killed in the shooting was 47-year-old Cheri Twilley, a mother of six adult children, one of whom was also wounded in the gunfire.

The shooting happened shortly after 7:30 p.m. Monday in the 1600 block of Tuscaloosa Avenue. Birmingham homicide Capt. Joe Roberts said Twilley and Isom had a brief altercation in a convenience store at that location. The two knew each other in passing, according to police and Twilley’s family, but were not friends or involved in any other way.

They parted ways at the convenience store and just moments later, police say, Isom opened fire on Twilley’s vehicle at a nearby stop sign. "The altercation that came before this crime was a very minor altercation that turned into a homicide,'' Roberts said. “It was extremely uncalled for.”

Twilley is the mother of four men and two women - ages 23 to 30. She and one of her sons, who is hearing impaired, were together Monday night when the shooting happened. The son was driving when they were shot, and immediately drove his mother to Princeton Baptist Medical Center. Police were then alerted to the shooting.

Twilley was pronounced dead at the hospital. Her son is expected to survive.

Once investigators positively identified Isom as the suspect, they carried out search warrants at his Birmingham home. He is known to frequent the southwest side of town. They found guns at his home, and believe he has more with him. “We have also linked him as a possible suspect in another homicide and he is heavily armed,'' Roberts said.”

Crime Stoppers of Metro Alabama in September featured Isom as one of their wanted suspects. Authorities have not said in which homicide besides Twilley’s he is a suspect. Roberts said Birmingham police and the U.S. Marshals Gulf Coast Regional Fugitive Task Force are now searching for him. Court records show has previous arrests for robbery, drug possession, and gun crimes.

"This is a major figure who we need to get off the streets,'' Roberts said. “We’re doing everything in our power to protect the citizens of Birmingham. We need your help.”

The slayings bring the city’s homicide homicide tally this year to 98. Of those, at least 11 have been ruled justifiable and therefore are not deemed criminal. Police departments only have to submit criminal homicides to the FBI for their year-end tally. In all of Jefferson County, there have been 152 homicides, including those in Birmingham.

Anyone with information on the deadly shooting is asked to call Birmingham homicide detectives at 205-254-1764 or Crime Stoppers at 205-254-7777.