Policemen shoved and wrestled with justices of Guatemala’s top electoral tribunal Saturday, as prosecutors sought to seize the tally sheets of votes from the August presidential elections. There were harrowing scenes of justices holding tight to boxes, as police tried to wrestle them away as part of raids to investigate spurious claims of voting fraud. Observers at the time said they saw no evidence of any such fraud, and most in Guatemala see it as an attempt to weaken or disqualify the winning candidate, Bernardo Arévalo.