A senior lawyer who secretly installed GPS tracking and audio recording devices in his ex-girlfriend’s car to see who she was dating was suspended for at least one year.

The Supreme Court of Pennsylvania Aug. 30 granted a joint petition consenting to discipline for Michael J. Casale, Jr. that suspended him from practicing law for five years, with four years stayed on conditions.

After Casale and his girlfriend split up, he went into her garage at night and put a...