SOURCES:

An Almost Perfect Murder : David Brown Finally Will Pay for His Fatal Manipulation of Others - Los Angeles Times

David Arnold Brown (1952-2014) - Find a Grave Memorial

Sicko California father David Brown convinces his teen daughter to kill wife, then lets kid rot in jail as he lives high life off insurance money – New York Daily News

Brown's Wife Tells of Their Earlier Affair - Los Angeles Times

PEOPLE v. BROWN (1992) | FindLaw

If You Really Loved Me: Rule, Ann

SOURCES: 

Police: Dentist killed wife by lacing shakes with poison

Dentist Poisoned Wife to Death to Start 'New Life' With Paramour, Cops Allege

https://s3.documentcloud.org/documents/23718101/23cr664-craig-james-toliver_redacted.pdf

Oleandrin: A Systematic Review of its Natural Sources, Structural Properties, Detection Methods, Pharmacokinetics and Toxicology - PMC.

Dentist Poisoned Wife to Death to Start 'New Life' With Paramour, Cops Allege

Just a Pinch of Cyanide: The Basics of Homicidal Poisoning Investigations | Office of Justice Programs.

Murder By Poison | The New Yorker

Who was Colorado dentist James Craig's wife Angela and how many children did they have? | Daily Mail Online

SOURCES: 

Nicholas Firkus trial: Husband found guilty of wife’s 2010 murder

Was there a stranger in the house, or did her husband murder her? Case goes to Minnesota jury

Minnesota man convicted of shooting and killing his wife with a shotgun on eve of eviction

State v. Nicholas Firkus | Ramsey County

Husband Arrested for Murder 11 Years After Claiming Wife Was Shot During Struggle With Intruder

Four years after St. Paul killing, Heidi Firkus’ family wants answers – Twin Cities