Accused absconding in 138 NI ACT

I have 4 cheques bounced total 6 lacs . Deal was done in Delhi but after that i had to shift to Tamil Nadu . I presented the cheques in Tamil Nadu and filed 4 cases accordingly . Accused�s mother filed a normal written report that his son is missing ( after the date of cheques and before the case filing date ) . His mother on whatsapp tried to negotiate with me for 25% of the total amount and denied . ( A valid proof of liability) Its been an year now. His family is not receiving summons on his behalf as he is legally absconding. His family saying we cannot come to Tamil nadu from Delhi on every hearing and accused is missing even we dont know where he is ( but they actually know ). I have is Pan card , adhar card and vital info . He is nowhere active now . Living discreeetly. What shall I do next ?