A whole family goes missing. Is it Voodoo? Or just plain greedy murder?

20th century case
A whole family goes missing. Is it Voodoo? Or just plain greedy murder?
Tommy Recco, aka Geronimo, is very unlucky: he tends to be surrounded by murders. This is an affair that takes over 20 years to be resolved.
In 1978 in the Oise department, North of Paris, a serial killer is at work. It takes a year to the police and the gendarmerie to catch him, as he was hiding under their noses.
From January 1898 to April 1906, The Pollet gang, aka The gang from Hazelbrook, commits 118 crimes, mostly with arms, 7 assassination attempts, and 4 murders on a territory going from Flemish Belgium to the mining country of Northern France. They were very organised and the gang included up to 30 people.
A bad smell guides the emergency services to a house where bodies are discovered. The house belongs to a doctor that will become the most famous and infamous in French history.
On the 6th December 1928, the bodies of the Richaud family are discovered at their farm in the South-East of France. They had been beaten to death and their skulls crushed beyond recognition. The Marseille gendarmerie takes on the case, and there is a link to episode 14.
Christian Ranucci was accused of abducting and killing Maria-Dolores Rambla in 1974. He will be the second last person to be executed in France, and doubts exist on his guilt.
Until 1972, Boutiers-Saint-Trojan was an anonymous village without any happening out of the ordinary. On Christmas day 1972 that changed forever: a whole family disappeared without a trace.
On the 5th September 2012, in a remote location in the French Alps near the Swiss border, a family of 4 and a cyclist are gunned down on rest stop.
Michel Fourniret is a rapist, paedophile, and serial killer that acted in France and Belgium in the 80s and 90s.