Complex sentence: He makes his close friend Lal to earn the confidence of Singarasu and collects all the information about his illegal business activities, while they are both also heavily involved in kidnapping rich businessmen in the city demanding money.
Split into simpler sentences: He makes his close friend Lal to earn the confidence of Singarasu and collects all the information about his illegal business activities. Also Selvam and Lal are involved in kidnapping rich businessmen in the city demanding money.