Heres what i think happend...

well I have a really high feeling that Ambika (CM) was behind this even tho i really really liek her character, the way she described everything and what she did during the time of diawali and stuff she just never went into much detail and quickly cut her story short and changed the subject most of the time and what i think happend was since dadaji was very ill, everyone obviously knew that ambika must have went into the rooma and tried to get the property on to satyans name or some of the property onto satyns name or something becuz right now they really dont have anything right? so i think that something must have happend that alekh witnessed and then cant explain much but w.e ambika did she must have scared alekh saying that if he told the police would come after him cause he murdered his dadaji and then maybe alekh ran and fell down the stairs and last thinghe saw was a picture of vasu with red roses or something and then ambika must have been with him 24/7 when he was ill to make sure that if he remembered anything and told anything to anyone she would be there and know or something? sorry im not good at explaining but i have a really good feeling that it is somewhere along those lines..

i guess d same ...but remember b4e rangi marriage there was ambika and vasu conversation where ambika says that jo kuch barso pahle alekh ke sath hua

hmh.. i think that ambika was referring to the fact that he witnessed dadaji get murdered or something I Dont Know :S