"Stay motivated, it'll come," answered his 19-year-old contact.
He went on to offer the child 150,000 kronor ($13,680) to carry out a murder, as well as clothes and transport to the scene of the crime, according to a police investigation of the exchange last year in the western province of Varmland seen by AFP.
In this case, four men aged 18 to 20 are accused of recruiting four minors aged 11 to 17 to work for a criminal gang. All were arrested before carrying out the crimes.
The preliminary inquiry contains a slew of screenshots that the youngsters sent to each other of themselves posing with weapons, some with bare chests or donning hooded masks.
Questioned by police, the 11-year-old said he wrote the message to seem "cool" and "not show his fear".
The case is not an isolated one.
Sweden has struggled to rein in a surge in gang shootings and bombings across the country in recent years, linked to score-settling and battles to control the drug market.
Last year, 53 people were killed in shootings, increasingly in public with innocent victims also dying.
Sweden has struggled to rein in a surge in gang shootings and bombings across the country in recent years, linked to score-settling and battles to control the drug market.
Last year, 53 people were killed in shootings, increasingly in public with innocent victims also dying.
Sweden's gang crime is organised and complex with gang leaders operating from abroad through intermediaries who use encrypted messaging sites like Telegram, Snapchat and Signal to recruit teens under 15, the age of criminal responsibility.
Hits are subcontracted with the parties only communicating online, Stockholm University criminology professor Sven Granath told AFP.
Others recruit in person, seeking out kids hanging around in their neighbourhoods.
The number of murder-related cases in Sweden where a suspect is under the age of 15 rose from 31 in the first eight months of 2023 to 102 in the same period this year, according to the Prosecution Authority.
Granath said the children who are recruited are often struggling in school, have addiction problems or attention deficit disorders, or have already been in trouble with the law.
"They are recruited into conflicts they have no connection to -- they're just mercenaries," he said, adding that they haven't necessarily been a member of a gang before.
According to a recent BRA report, recruiting kids is part of the gangs' business model, where children recruit even younger children -- and once they're in, it's hard to leave.