Thomas Mortimer, the Massachusetts man suspected of killing his wife, two young children, and mother-in-law, pleaded guilty on Wednesday to four counts of first-degree murder. Mortimer was arrested and had left a note on the kitchen table saying, “I did these horrible things. What I have done is extremely selfish and cowardly. I murdered my family,” according to District Attorney Gerry Leone. The victims were found in their home with their throats slashed and lying in pools of blood. Mortimer had confessed that he exploded into a homicidal rage after a $2,499 check to the IRS bounced—and then his 4-year-old son witnessed some of the murders before Mortimer killed him too. Mortimer was sentenced to life without parole.