A family of four was found dead on February 21 in Andheri (West), Mumbai, reports mid-day. The bodies of the two siblings - Somnath Kartik Pal (20) and his sister Bharti Pal (25) were found hanging at an Oshiwara flat, where they were employed as housekeepers. Later that day, the police discovered the bodies of the 45-year old mother, Sikha Pal and her second husband, Ajitkumar Patel (50), at their flat in Lokhandwala.

While investigating this quadruple suicide case, the police uncovered clues that are both puzzling as well as deeply disturbing. According to NDTV, claims of sexual and physical abuse, stacks of cash and an ominous note taped to a phone have further complicated the case.

This is probably the murkiest suicide case to make headlines, in the recent times. What drove an entire family to end their lives? Are we missing a crucial piece of the puzzle, one that might somehow tie everything together?

As the Mumbai police grapples with these questions, here's a quick look at what we know so far.

Were the suicides triggered by abuse?

The brother-sister duo were employed by Tinku Singh and, if reports are to be believed, he drove them to end their lives. Allegedly, Singh sexually abused Bharti repeatedly and has also been accused of beating up her brother Somnath.

These claims have been made both in a suicide note found at their parents home, as well as in videotaped messages, addressed to the local assistant commissioner of police in Mumbai.