Transfer of funds regarding

Hello Sirs/Madams, My younger brothers friend asked me my bros bank a/c and my bank a/c to get money from from his friend who is in abroad and we gave and they transfered 8 lacs in each of our account and we gave that money to my bros friend who asked our account for fund transfer thisheld in 2012 and after an year he transfered a sum of money to our accounts without asking us so we scolded them not to send next time nd they stopped sending the money by next time.We did not know the one who send us the money.Later in 2015 september my brothers friend absconded due to high debt fro friends and relations. At that time the person from abroad called us by phone and threatened to pay the money back. At that time he said that the person ran away has got money like this in his relative accounts also and so better u ask that person relative also to repay the money. i said the situtaion to him later he did not replied me anything. After 3 months that is in jan 2016 he filed an petition in our local SP office about this case. There the police called my bro and asked the reason behind it. my bro briefly wrote the letter stating the incident and gave it to DSP there about the incident. But now in NOv 2016 that abconded person is arrested by police in another case in our near by capital city. Now the police asked my brother again about that old case for tht my brother told the police that if u ask the person who is arrested now will say the truth that we gave the money to himn and just we are meseengers of money unknowingly. But the police is not responding to my bro well and saying that they me arrest me and my brother in this case and they saying they they filed an FIR 6 months before itself and you guys are not coming and seeing us. What we should do sir. If they asked that arrested person he will defintely say the truth. Because he only got the miney from us and he is the one who asked us the bank account. We did not know the sender of money. we know only the receiver of money. But the sender makes big problem. We did not know the result and solve this issue. Please help us.