P Balachandra Kumar, key witness in actress attack case, died at age 58
He passed away at a private hospital in Chengannur on the morning of October 26
Kumar had been undergoing treatment for a prolonged illness
His death follows a prolonged illness related to his health
He provided crucial evidence in the actress assault case
His testimony implicated Dileep in the case
He revealed details about Dileep's alleged involvement
Kumar disclosed that Dileep watched the assault video
He testified that Dileep tried to endanger investigation officials
His body will be transported to Thiruvananthapuram