The data systems are probably fine. Police departments use VMS, ACS and PSIM systems that have audit trails built in.
This is user error/ ignorance/ intentional ignorance.
Edit I guess I shouldn't comment on backwater 3rd world counties. I live in an urban center and they are all kitted out here.
Yup I had a thought about this. If they have appliance based recorders, tampering is a much more simple thing. If they "sent the drives off" this is probably the case, it wouldn't make sense to disassemble a server RAID to perform forensics.