Family Fired!

Macy Beem, who was a wife, a mother of 4 children and a grandmother of nine grandchildren, was shot to death by an angry relative. Find out the name of the relative by putting together all the clues you have below.

The killer's sister was suspected by her brother or sister and confirmed her distrust by talking to three people: her grandfather Bevan, her cousin Bo, and her uncle (blood relative) Bartlet. She called the police, and the suspect was apprehended right at the victim's funeral. Only the direct descendants and their spouses were present. (Note: None of Macy's grandchildren were married or had kids, and no two people have the same first name.)

1. Bartlet was talking with his brother-in-law Barry.

2. Bart, Buck, and Bruce (who were all brothers) were by their grandmother's casket.

3. Macy's daughter May, and her husband Ben, had two children: Missy and Bernie.

4. Mo, Bevan's son-in-law, was calming down his wife Robin, and both were trying to keep an eye on their sons.

5. Bo was alone grieving in corner, while his sister Molly was talking with their cousin Megan.

6. Myra was consoling one of her two children, Brad, who had been very close to his grandmother.

7. Bevan was with his daughter Maria.

NOTE: Each of the 4 couples has at least 2 kids.

Who is the killer?