He says he fears his detention by state security forces is imminent.
Hallyev told RFE/RL's Ashgabat correspondent that his son, daughter-in-law, and son-in-law have all lost their jobs, which he also attributes to his work with RFE/RL.
Hallyev says the local Prosecutor's Office does not respond to his complaints regarding the situation.
In addition, Hallyev's international phone lines have been severed since mid-November and his access to the Internet has also been restricted.
Local officials have promised to deal with the matter as soon as possible.