BANKING

Keating Aide Sent to Prison: A son-in-law of convicted Lincoln Savings & Loan operator Charles H. Keating Jr. was sentenced to 40 months in federal prison. He had pleaded guilty to three charges of misapplying $13.9 million of the failed Irvine thrift’s insured deposits. Robert M. Wurzelbacher Jr., one of Keating’s five sons-in-law, will be eligible for parole immediately but will probably serve at least 26 months, said his lawyer, Mark E. Beck. Wurzelbacher, 39, who was an executive at the S&L;’s parent company, admitted that he helped cause the thrift to extend loans to a hotel partnership in which he, Keating and other insiders had interests. He said he knew the loans were risky and were not likely to be repaid.