LA JOLLA — Six months after friends found the strangled body of La Jolla millionaire John Watson in his home, the man accused of committing the murder is in court. A preliminary hearing began Monday in the San Diego County Courthouse to determine if there is enough evidence to bring Kent Keigwin to trial. Police said Keigwin, 60, showed up at Watson’s home while police were there collecting evidence — three days after Watson’s body was discovered. Keigwin is suspected of transferring $7.5 million out of Watson’s investment account into an account under his own name. Watson was a retired biotech executive and a board member of Tech Coast Angels, an investment group that provides money for startup companies. Keigwin could face charges of murder for financial gain, identity theft and burglary. —Kendra Hartmann