Oto Biederman (born 5 August 1973) is a Czech serial killer and member of the "Kolínský Gang", sentenced to life imprisonment for murdering 5 people.
Biederman worked in the distillery until 1993, and since he began to develop an intensive interest in weapons and martial arts, he found a job as a security guard.
[1] In the spring of 1993, SAFE-GUARD's operational director Ivan Vrábel was scheduled to work with two other employees, Roman Procházka and Jiří Šťastný, who planned to a Krone department store in Prague.
On the night of 6–7 July, Šťastný, Procházka and Biederman went to the Krone department store dressed in the uniforms, which was located on the corner of Jindřišská Street and Wenceslas Square.
In the spring of 1995, Martin Srb, owner of a small gloves factory, mentioned his planned trip to the United States, for which a large amount of money had to be prepared at his vault at home.
The gang, who knew Srb, chose to lure him to a lonely place, kill him there, and rob the keys from the safe that he was supposed to carry around.
On the evening of 1 June, Biederman and Jaroslav Pavlíček met Srb in the village of Škvorec, inviting him to a billiard club in Prague 21.
At that moment, Chládek opened the door to check the situation, causing Langer to move and Biederman to subsequently shoot him in the head.
Vrábel told Pavlíček his intention to buy the land at a fair price, scheduling a meeting on September 28 together with Biederman, who would pick him up at his parents' house.
Biederman secured a hotel room using a stolen ID card, in which he, Karnoš and Bleier would meet, with Chládek waiting prepared in the car.
An important testimony was given by some random passers-by, who spotted a red Renault 25 with noticeably muddy license plates on the day of the murder.
Bleier's family managed to decode his electronic diary, in which there was information about the red Renault, which was owned by Miroslav Karnoš, whom he had met briefly before the murder.