Alain Fraitag says the former bus driver died in a secure hospital in Nancy in the early hours of Sunday.
Louis was jailed for life in 2004 for the murders of seven young women in the 1970s.
Many of the victims were mentally disabled and in care in the northern Yonne region. Some had used a bus driven by Louis.
He admitted carrying out some of the murders in 2000, but later retracted the confession.
The case against Louis was plagued with a succession of judicial problems.
In March 2002, the government punished three magistrates for failing in their duties by allowing Louis to avoid prosecution for more than 20 years. The thoroughness of the investigation was also questioned.
Many of the victims had severe learning difficulties, yet the local authorities simply recorded them as runaways. French police appeared to show little interest at the time.
Only one local gendarme pursued evidence against Louis, but the inquiries were halted and a damning report was lost until 1996.
The gendarme was then found shot dead – in what was recorded as suicide.
It was only thanks to pressure from the victims’ families that the issue was kept alive until Louis was convicted and jailed.
Air Mukwai_
October 22, 2013 at 10:50 am
Who cares?
We had also our own serial killers like uncle Berry, Chilala, john pondo, mushala, never spoiler kapenda, J-Fanta, Mailoni brothers, when they died nothing was published in France.
ntalamisoka
October 22, 2013 at 12:06 pm
ba air malawi mukwai mushala serial killer nishi mwalabako bambi kk na ftj hahahahaha.
Katubi.
October 22, 2013 at 6:47 pm
Serial Killer Mushala ? Let us get the facts right.
yongwe
October 25, 2013 at 9:15 am
Mushala was never a serial killer…he was a rebel leader