The lead investigator for the presidential panel delving into the BP oil spill said on Monday that he had found no evidence that anyone involved in drilling the doomed well had taken safety shortcuts to save money...Fred H. Bartlit Jr., a prominent trial lawyer hired to lead the panel’s inquiry, disputed the findings of other investigators, including plaintiffs’ lawyers and members of Congress, who have charged that BP and its main partners, Transocean and Halliburton, had cut corners to speed completion of the well...Representative Edward J. Markey, ...took issue with Mr. Bartlit’s characterization of the motives of BP...Mr. Markey, who led a Congressional investigation into the accident, said the company had consistently taken shortcuts to save money. “When the culture of a company favors risk-taking and cutting corners above other concerns, systemic failures like this oil spill disaster result without direct decisions being made or trade-offs being considered,” he said.