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He defended his brother and the family saying they are law-abiding citizens.
"Our brother was a law-abiding citizen with no criminal record. He is a tuk-tuk operator and is a married man with a family. If he has done any wrong, he should be charged or booked at a police station," said Mohamed.
Amin's father, Mohammed Alawi, appealed to the government to help him trace his son. He said they migrated from Yemen to Somalia as refugees and later to Kenya due to war and they have lived peacefully.
"My son was abducted on January 3 at around 9 pm. He had gone out with his friends. It is only right to know where he is and what he did wrong. Am asking the government to help us find him," said Mohammed.
Human rights groups led by Haki Africa Programs Officer, Mathias Shipeta, called on the Inspector General of Police to help the family find their son.
Shipeta noted that there have been more than 100 forced disappearances in the last five years.
"It's sad that we opened the year with a case of forced disappearance. We ask the IG to search for the man. If he has committed any offence he should be taken to the police station, and if it was criminals let the police help the family to find him," he said.