In 1882, a young man named Henry Palmer, a recent high school graduated , went to work as a messenger for the Fall River National Bank. Palmer was highly intelligent and a hard worked, quickly moved his way up the ladder and in ten years he vecame a bank teller.
He had nearly perfect re ord of attedance and never asked for or took a vacationl As a result, his superiors were puzzled dwhen he didnt show up for work.They contacted his wife, asn she had no idea where he could be and that she was frantic with worry. The bank officers were suspicous. They stated going through his books. They found that he had been embezzing funds for 14 months. His system was simple. When a large depositor added, let's say 10,000 dollars, he would give him a receipt for that amount. He would pocker perhaps 2000 and enter 8000 in his deposit book. At the end of the day his account would tally very nicely witht he amount the bank actually received. As long as he came into work he could cover his tracks.
My idea is that Andrew found out about this and was black mailing the man. Maybe Henry came over to the house; Abby let him in. He had the plan to kill Andrew, but he had to do something with Abby. After all, she could identify him, so he killed her, then waited for Andrew. Think maybe this scenario would work?