Michael B., who is suspected of committing attacks with a grenade on coffeeshops in Delft in May of this year, had been convicted of the so-called Irish bath murder. The Irish Damien Monaghan and the brothers Vincent and Morgan Costello were shot dead.

Michael B. grew up in a world full of violence. In February 1987, B. is not yet 10 years old, his father is shot dead by a bodyguard of the Rotterdam gambling king Johan Bestebreurtje. Because his mother is heavily addicted to the drugs, he goes to live with his grandparents. He begins to attach himself to his godfather, but he is also shot dead - at a camp site in Rijsbergen.

When he was fifteen, Michael B. would wander and he would increasingly use coke. In a tantrum he shoots down a friend of his mother, but the judge gives him a low sentence. But B. remains restless and gets more and more on the bad path. In the beginning of 2000 he and his close friend Damien Monaghan, alias "Monnie", committed some armed robberies. In the night of 26 to 27 April of that year, things go completely wrong.

That night Michael B. is in a flat in Scheveningen. Also present: Monnie, the Irish brothers Vincent and Morgan Costello and the 20-year-old Ronald van B. from Wassenaar. Under the influence of alcohol and coke, he is convinced that the Costello brothers want to kill him. B. shoot them a bullet in the head. Michael's best friend Monnie is unlucky to be on the firing line. He too finds death.

Michael B. and Ronald van B. try to calm down with xtc and rohypnol and order escort girls. They stay in the apartment for days. Then the corpses begin to stink. The two saw the bodies of the three victims in pieces and set the remains on fire in the bathtub. In the end, the police can only see how many bodies there were at the number of feet. A DNA match eventually leads the police to Michael B. In appeal he is sentenced to 16 years in prison plus tbs in 2002. Ronald van B., who would have stabbed Vincent Costello with a knife, gets 12 years in prison.

Michael B., now 41 years old, was arrested in Noordwijk in June of this year . In addition to the grenade attack on coffeeshops The Game and The Future in May 2018, he is also suspected of possession of weapons. Two others were arrested with him, a 22-year-old man who was sitting in the car next to him and a 30-year-old woman from The Hague; she is the widow of criminal Piet Pronk.