Rozette Allen said her family traveled from Illinois to pay respects to their father Friday afternoon.
She said Reed and her brother had unresolved issues from the past.
She said Reed went up to her brother to shake his hand outside the funeral home but Curtis Allen wanted to be left alone.
“He started pulling out a gun from his bookbag, and I’m like, ‘He has a gun, he has a gun,’ and he started shooting,” said Rozette Allen.
Benjamin Wynne works at Miles J. Kimble Mortuary and Cremation. He said he was inside when he heard gunshots.
“When he went through, ran through the funeral home, I immediately called police,” said Wynne.
Police said Reed shot Curtis Allen multiple times.
Allen was taken to the hospital and died Sunday.
Officers arrested Reed and charged him with first-degree murder, aggravated assault and other charges.
Rozette Allen said she will miss her brother, whom she described as a loving father of four kids.
“I love him keep watching over us, watch over all of us,” said Allen.