Is Hamas behind Moussa Arafat's murder?

In 1996, Moussa Arafat's Military Intelligence detained senior Hamas operatives and shaved off their beards in what is still remembered as a major humiliation. Moussa Arafat was linked to many incidents of corruption, extortion, and decadent hedonism, but other Fatah and PA officials have been linked to extortion rumors, including Preventive Security chief Rashid Abu-Shabak and national security chief Mohammed Dahlan. People are sure their salaries could not support their luxury homes.