Greg did have thoughts like, how did Mrs. Less know? Did Mrs. Less lie just because he fired her husband? Also did the whole neighborhood know about this? Why would Bob do this to him? However, Greg was too in raged to care.
Greg goes to see his twin brother Bob, Greg asked his brother if he heard about his wife and son's disappearance. Greg always tells his brother everything, but little did Bob know Greg didn't tell him his opening act.
Greg found out a week before his visit to his brother's place, that Bob's neighbor Mrs. Less, said that Bob might have kidnapped his family and killed them, at least that was the rumor, so Greg devised a plan to make his twin brother pay.
We think are neighbor's hurt.
Greg's plan was set in motion and his brother didn't think anything suspicious about why Greg wanted him to drink four cups of (POSION) Koolaid. Later that day Greg told Bob he should get some rest, since Bob works every weekend he took the bate.
I KILLED HIM, YES I KILLED HIM
That night Bob had already died from the poison and to add on Greg decided he would stab his brother in the head.
Mr. and Mrs. Less over heard a loud laugh or scream and called the cops to make sure Bob wasn't hurt.
Now Greg is a school shooter facing life all because he picked revenge over forgiving and forgetting. (Plot twist) Mr. and Mrs. Less killed his family. THE END