Insect Identification Help

Parm, one of our rangers pointed out the following larvae the other day while we were walking across a large plain together. the larvae at that time was not exposed and the only indication of his presence was a simple non descript hole. parm said in swahili "watch". He cut a piece of grass, chewed the tip a bit and then wiggled the end near the entrance to the hole. The larvae attached, pinched the grass and with a smooth motion parm removed him from his hole where i photographed him before returning him to his home.I reckon this must be some kind of beetle larvae. I have never seen tiger beetles here and he is far too big but he does resemble their larvae. Anyway he is very predatory and I wouldn't be surprised if he was one of the large nocturnal ground beetles that prowl the savanna in search of prey. ideas welcome.