i noticed that too, and immediately thought it could have been written by someone else....perhaps his murderer.
but two points:
1. has the deceased been identified as a native speaker of english? the last line is not grammatically accurate.
2. he could have been intoxicated and highly emotional....which could lead to these type of errors
if it was a suicide, then absolutely a possibility.
what does the law say.....would the wife get an insurance payout if the dead man set the house on fire?