The board of trustees of the county employees’ retirement system shall cease paying benefits to any survivor or beneficiary who is charged with the intentional killing of a member without legal excuse or justification. A survivor or beneficiary who is convicted of such charge shall no^* longer be entitled to receive benefits. If the survivor or beneficiary is not convicted of such charge, the board shall resume payment of benefits and shall pay the survivor or beneficiary any benefits that were suspended pending resolution of such charge.