ID Go: A man who is meticulous about his lawn runs into conflict with a new neighbor who doesn’t have the same priorities. The feud between the two men viciously escalates, ultimately ending in an episode of shocking violence. -Dead Men Tell No Tales, Fear Thy Neighbor (S5, E9)
Mark Tatum fatally shot his neighbor and Army veteran David Allen, 67, on June 1, 2012 in Louisville, Kentucky after a long, protracted neighborhood battle. Tatum shot through the windows of Allen’s home and then shot him fatally while he was fleeing to safety in his backyard. Tatum used a silencer so the shots went unnoticed until David’s wife Sue returned home and found her husband lying dead in the backyard. Considering the pair’s long standing feud, Mark Tatum was immediately a suspect. Police found weapons and ammunition in his home and located Mark at a friend’s house, arrested him, and charged him with murder. Prosecutors believed that Mark acted with the intent to kill. Four years after shooting and killing David Allen, Mark went to trial and was found guilty of his murder in 2016. Mark Tatum was sentenced to 35 years in prison and has to serve at least 20 years in prison before he is eligible for parole. David’s wife Sue moved to California to be with family after her husband was murdered. David Allen met his wife Sue while serving in Korea with the U.S. Army.
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Related Links:
Obituary: David Thomas Allen, Louisville, Kentucky (June 1, 2012)
Man charged with murder, victim identified
New details released in connection with Gagel Avenue slaying
Man indicted after allegedly killing neighbor
Mark Tatum trial expected to begin
Man accused of killing neighbor to appear in court
Testimony to resume for man accused of killing neighbor after feud
Sentencing for man who fatally shot Gagel Avenue neighbor delayed
Louisville man headed to prison 4 years after shooting neighbor
Louisville man headed to prison 4 years after shooting neighbor
Mark Tatum v. Commonwealth of Kentucky (2016)
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MILITARY JUSTICE FOR ALL 
I watched this show and I actually feel bad for the husband, someone needs appeal this
Too bad we didn’t get Sue’s side of the story (David’s wife). It would’ve been much different than the “my poor brother Mark was bullied” sob story from the sister, who is clearly an enabler. (I actually yelled that at the TV.)
Both David and Mark acted like 8 yr olds pissing on the playground.
The difference, however, is David didn’t have homicidal tendencies. Mark does.
Denial ain’t just a river. Someone tell Mark’s sister.