Keith Vaz, chairman of the Home Affairs Select Committee, says he has called Lincolnshire's Police and Crime Commissioner to question him over events which have happened over the last few months.
Alan Hardwick suspended Neil Rhodes, temporary Chief Constable of Lincolnshire Police, over "potential conduct matters".
Mr Rhodes returned to work after winning a High Court ruling against his suspension.
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Eddie Hall, 41, had been working as a chef in Ho Chi Minh City for over a year but was reported missing in January.
Cold with wintry showers for North and West Yorkshire and across the Pennines. Ice and snow warnings issued
Hundreds are expected to march against council plans to close North Yorkshire's only remaining middle school.