Misuse of Kela money

Misuse of Kela funds shouldn't go unaccounted for. I know a person who enjoys Kela funds. He has been outside Finland for more than two years. Kela money are for the poor and needy and those who cannot work. I do not like this. It is theft. He also rents out his apartment and receives money under the table. This is illegal. I know his first name and I know the city where he lives. Can I find help here or should I contact Kela?