There is no need to call the expert on immediate basis.
For a data analyst, its is peanut to check and validate the voting trend using the timestamp field. Any forgery will be reflected in the DB and would be a used as an evidence against the person responsible (for custody of the EVM).
These are just lame excuses.
IT has resolved many more complex things than this one.
Before jumping electronic and computerized database, try figuring out who kinapped the presiding officers in deska election.
Did PM take any initiative to probe the fiasco, catch who were behind the rigging attempt and punish them without any biase ?
To my knowledge,he is absloutely not interested to find out and use his power and influence to weed out such elements no matter which side they belong .
There is a definit trust deficit between him and opposition.. It will be a chaos if he forced his way to implement changes in electoral proceedures without taking the stake holders in confident. But we all know he is a stubborn person, Buzdar example is in front of us.