What was the alleged plot that Alfred Ruff described during his interrogation?

During interrogation, Alfred Ruff described a disturbing conspiracy allegedly involving his stepdaughter and her friend to 'get mom out of the pictures.' When questioned by detectives, Ruff made bizarre claims about drugging his wife Lisa's soda as part of this plot. The detectives confronted Ruff about the serious nature of his actions, directly stating 'What you're doing is trying to kill your wife.' The interrogation revealed Ruff's attempt to frame his stepdaughter while actually being implicated in the attempted murder himself. This shocking case explores how Ruff tried to cover up his own criminal offense by creating an elaborate conspiracy story.